电工电子技术模拟题（四）
填空题(空2分20分)
1三相交流电路中称负载三角形连接时相电流线电流关系(ILIP) 相电压线电压关系(UPUL)
2引入负反馈放电路起稳定(静态)工作点提高放倍数稳定性改变(输入输出)电阻减(失真)拓展通频带等
3谓控制电器指电路中起(通断)保护(控制)调节电器件
4 型触发器动作特点：时钟CP(升)前刻瞬间JK(接收)输入信号求CP1期间输入状态保持稳定时钟降产生(输出)
二 单项选择题（题4分20分）
I
1图1示电路中电流I（ B ）
•
3A
+
30V
A 3V
6Ω
B 5A
图1
•
C 2A
2图2示电路中电位器RP1滑动端移动RP2滑动端右移
动I2
时电流I1I2变化趋势（ B ）
RP2
RP1
I1
IS
A I1减I2增
图2
B I1增I2减
C I1变I2减
3正弦交流纯电感电路中电压电流关系（ C ）
A i B I C I
4已知电路某元件电压u电流i分u10cos（ωt+200）V
i5sin（ωt+1100）A该元件性质（ C ）
A 电容 B 电感 C 电阻
5磁力线意点切线方该点磁场方磁针磁力作（ A ）极指方
A N极 B S极 C N极S极
三 计算题（题15分30分）
1已知某正弦电压t0时值 u0110V初相600求效值
解：正弦电压瞬时表达式
uUmcos（ωt+600）
t0时
u0 Umcos600
Um220V
U220V
2已知交流信号源阻250欧姆通变压调变压器接25欧姆负载RL变压器初级等效电阻等信号源阻时信号源输出功率负载获功率问变压器变压应该少？
解：根K2变压器初级等效电阻R＇L K2RL25K2
变压器初级等效电阻等信号源阻时信号源输出功率：
R＇L K2RL25K2250
K2100
变压K10时负载获功率
四 简答题（题5分30分）
1电压源模型电流源模型等效变换条件什？
果电压源模型输出电压输出电流电流源模型输出电压输出电流应相等说外部电路言二者伏安特性相两种模型等效互换
2三素？行正弦交流电量瞬时波形图标出3素
幅值频率初相
3异步电动机起动求什？说明原
（1）足够起动转矩电动机克服负载转矩迅速旋转起
（2）起动电流太否会供电电网产生较电压降影响电网电气设备正常工作
4什正偏置反偏置？二极正偏置反偏置时分什状态？
答：PN结P区接电源正极N区接电源负极时称外加正电压正偏置P区接电源负极N区接电源正极时称外加反电压反偏置
正偏置时二极处导通状态反偏置时二极处截止状态
5 组合逻辑电路分析步骤什？
答：逻辑图中门输出端加标注写出门输出逻辑函数表达式门输出逻辑函数表达式进行迭代进行必化简写出真值表说明该电路途
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄After earning his spurs in the kitchens of The Westin The Sheraton Sens on the Bund and a sprinkling of other topnotch venues Simpson Lu fi nally got the chance to become his own boss in November 2010 Sort of The Shanghaiborn chef might not actually own California Pizza Kitchen (CPK) but he is in sole charge of both kitchen and frontof house at this Sinan Mansions＇stalwart It’s certainly a responsibility to be the head chef and then to have to manage the rest of the restaurant as well the 31yearold tells Enjoy Shanghai In hotels for example these jobs are strictly demarcated so it’s a great opportunity to learn how a business operates across the board It was a task that management back in sunny California evidently felt he was ready for and a vote of confi dence from a company that to date has opened 250 outlets in 11 countries And for added pressure the Shanghai branch was also CPK’s China debut For sure it was a big step and unlike all their other Asia operations that are franchises they decided to manage it directly to begin with says Simpson Two years ago a private franchisee took over the lease but the links to CPK headquarters are still strong with a mainlandbased ＇brand ambassador’ on hand to ensure the business adheres to its ethos of creating innovative hearthbaked pizzas a slice of PR blurb that Simpson insists lives up to the hype They are very innovative he says The problem with most fast food places is that they use the same sauce on every pizza and just change the toppings Every one of our 16 pizza sauces is a unique recipe that has been formulated to complement the toppings perfectly The largely local customer base evidently agrees and on Saturday and Sunday at least the place is teeming The kidseatforfree policy at weekends is undoubtedly a big draw as well as is the spacious secondfl oor layout overlooked by a canopy of green from Fuxing Park over the road The company is also focusing on increasing brand recognition and in recent years has taken part in outside events such as the regular California Week Still the sta are honest enough to admit that business could be better as good in fact as in CPK’s second outlet in the popular Kerry Parkside shopping mall in Pudong Sinan Mansions has really struggled to get the number of visitors that were envisaged when it first opened and it hasn’t been easy for any of the tenants here adds Simpson We’re planning a third outlet in the city in 2015 and we will probably choose a shopping mall again because of the better foot traffic The tearooms once frequented by Coco Chanel and Marcel Proust are upping sticks and coming to Shanghai Xu Junqian visits the Parisian outpost with sweet treats One thing the centuryold Parisian tearoom Angelina has shown is that legendary fashion designer Coco Chanel not only had style and glamor but also boasted great taste in food pastries in particular One of the most popular tearooms in Paris Angelina is famous for having once been frequented by celebrities such as Chanel and writer Marcel Proust Now Angelina has packed up its French ambience efficient service and beautiful comforting desserts and flown them to Shanghai At the flagship dinein and takeout space in Shanghai everything mimics the original tearoom designed from the beginning of the 20th century in Paris the height of Belle Epoque The paintings on the wall for example are exactly the same as the one that depicts the landscape of southern France the hometown of the owner and the small tables are intentional imitations of the ones that Coco Chanel once sat at every afternoon for hot chocolate The famous hot chocolate known as L’Africain is a luxurious mixture of four types of cocoa beans imported from Africa blended in Paris and then shipped to Shanghai It’s sinfully sweet rich and thick as if putting a bar of melting chocolate directly on the tongue and the fresh whipped cream on the side makes a light but equally gratifying contrast It is also sold in glass bottles as takeaway The signature MontBlanc chestnut cake consists of three parts the pureed chestnut on top the vanilla cream like stuffing and the meringue as base Get all three layers in one scoop not only for the different textures but also various flavors of sweetness The dessert has maintained its popularity for a century even in a country like France perhaps the world’s most competitive place for desserts A much overlooked pairing is the ParisNew York choux pastry and N226 chocolate flavored tea The choux pastry is a mouthful of airy pecanflavored whipped cream while the tea a blend of black teas from China and Ceylon cocoa and rose petals offers a more subtle fragrance of flowers and chocolate Ordering these two items featuring a muted sweetness makes it easier for you to fit into your little black dress Breakfast brunch lunch and light supper are also served at the tearoom a hub of many cultures and takes in a mix of different styles of French cuisines according to the management team The semicooked foie gras terrine is seductive and deceptive It’s generously served at the size and shape of a toast while the actual brioche toast is baked into a curved slice dipped with fig chutney The flavor however is honest strong smooth and sublime And you don’t actually need the toast for crunchiness This is the season for high teas with dainty cups of fine china and little pastries that appeal to both visual and physical appetites But there is one high tea with a difference and Pauline D Loh finds out just exactly why it is special Earl Grey tea and macarons are all very well for the crucial recuperative break inbetween intensive bouts of holiday season shopping And for those who prefer savory to sweet there is still the selection of classic Chinese snacks called dim sum to satisfy and satiate High tea is a meal to eat with eye and mouth an inbetween indulgence that should be light enough not to spoil dinner but sufficiently robust to take the edge off the hunger that strikes hours after lunch The afternoon tea special at ShangXi at the Four Seasons Hotel Pudong has just the right elements It is a pampering meal with touches of luxury that make the high tea session a treat in itself Whole baby abalones are braised and then topped on a shortcrust pastry shell a sort of Chinese version of the Western volauvent but classier Even classier is the dim sum staple shrimp dumpling or hargow upgraded with the addition of slivers of midnight dark truffles This is a master touch and chef Simon Choi who presides unchallenged at ShangXi has scored a winner again Sweet prawns and aromatic truffles — what’s not to love His masterful craftsmanship is exhibited in yet another pastry — a sweet pastry that is shaped to look like a walnut but which you can put straight into the mouth It crumbles immediately and the slightly sweet nutty morsel is so easy to eat you’ll probably reach straight for another My favorite is the dessert that goes by the name yangzhi ganlu or ambrosia from the gods The hotel calls it chilled mango cream with sago pomelo and bird’s nest – made with ingredients that resonate with every female soul It does taste like ambrosia with the sweetsour fragrance of the mango forming the first layer of taste and sensation and the pomelo sacs and sago pearls providing the tactile contrast The bird’s nest — it’s the ingredient that gilds the lily since it is supposed to nourish and nurture a perfect complexion For those unfamiliar with this exotic ingredient the bird’s nest is not a bundle of twigs but is instead the dried secretion that cave swifts use to build their nest Technically it’s bird saliva but the Chinese believe that it has collagenboosting properties essential to beauty To me it just tastes good adding a slight gelatinous crunch to the back of the teeth There is also a baked mushroom puff pastry that includes the highly prized Matsutake or pine mushroom You also get a choice of teas but I strongly recommend the aged Pu’er from Yunnan province It is a mellow tea that will go perfectly with the rich little nuggets and will warm you up on a cold afternoon Incidentally the general guide is green tea such as Longjing or Dragonwell for the hot season semifermented teas like Wulong or Iron Buddha for autumn and more warming teas like Pu’er for winter The ShangXi afternoon tea costs 228 yuan (37) per person and 388 yuan for the more opule
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填空题(空2分20分)
1三相交流电路中称负载三角形连接时相电流线电流关系(ILIP) 相电压线电压关系(UPUL)
2引入负反馈放电路起稳定(静态)工作点提高放倍数稳定性改变(输入输出)电阻减(失真)拓展通频带等
3谓控制电器指电路中起(通断)保护(控制)调节电器件
4 型触发器动作特点：时钟CP(升)前刻瞬间JK(接收)输入信号求CP1期间输入状态保持稳定时钟降产生(输出)
二 单项选择题（题4分20分）
I
1图1示电路中电流I（ B ）
•
3A
+
30V
A 3V
6Ω
B 5A
图1
•
C 2A
2图2示电路中电位器RP1滑动端移动RP2滑动端右移
动I2
时电流I1I2变化趋势（ B ）
RP2
RP1
I1
IS
A I1减I2增
图2
B I1增I2减
C I1变I2减
3正弦交流纯电感电路中电压电流关系（ C ）
A i B I C I
4已知电路某元件电压u电流i分u10cos（ωt+200）V
i5sin（ωt+1100）A该元件性质（ C ）
A 电容 B 电感 C 电阻
5磁力线意点切线方该点磁场方磁针磁力作（ A ）极指方
A N极 B S极 C N极S极
三 计算题（题15分30分）
1已知某正弦电压t0时值 u0110V初相600求效值
解：正弦电压瞬时表达式
uUmcos（ωt+600）
t0时
u0 Umcos600
Um220V
U220V
2已知交流信号源阻250欧姆通变压调变压器接25欧姆负载RL变压器初级等效电阻等信号源阻时信号源输出功率负载获功率问变压器变压应该少？
解：根K2变压器初级等效电阻R＇L K2RL25K2
变压器初级等效电阻等信号源阻时信号源输出功率：
R＇L K2RL25K2250
K2100
变压K10时负载获功率
四 简答题（题5分30分）
1电压源模型电流源模型等效变换条件什？
果电压源模型输出电压输出电流电流源模型输出电压输出电流应相等说外部电路言二者伏安特性相两种模型等效互换
2三素？行正弦交流电量瞬时波形图标出3素
幅值频率初相
3异步电动机起动求什？说明原
（1）足够起动转矩电动机克服负载转矩迅速旋转起
（2）起动电流太否会供电电网产生较电压降影响电网电气设备正常工作
4什正偏置反偏置？二极正偏置反偏置时分什状态？
答：PN结P区接电源正极N区接电源负极时称外加正电压正偏置P区接电源负极N区接电源正极时称外加反电压反偏置
正偏置时二极处导通状态反偏置时二极处截止状态
5 组合逻辑电路分析步骤什？
答：逻辑图中门输出端加标注写出门输出逻辑函数表达式门输出逻辑函数表达式进行迭代进行必化简写出真值表说明该电路途
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄After earning his spurs in the kitchens of The Westin The Sheraton Sens on the Bund and a sprinkling of other topnotch venues Simpson Lu fi nally got the chance to become his own boss in November 2010 Sort of The Shanghaiborn chef might not actually own California Pizza Kitchen (CPK) but he is in sole charge of both kitchen and frontof house at this Sinan Mansions＇stalwart It’s certainly a responsibility to be the head chef and then to have to manage the rest of the restaurant as well the 31yearold tells Enjoy Shanghai In hotels for example these jobs are strictly demarcated so it’s a great opportunity to learn how a business operates across the board It was a task that management back in sunny California evidently felt he was ready for and a vote of confi dence from a company that to date has opened 250 outlets in 11 countries And for added pressure the Shanghai branch was also CPK’s China debut For sure it was a big step and unlike all their other Asia operations that are franchises they decided to manage it directly to begin with says Simpson Two years ago a private franchisee took over the lease but the links to CPK headquarters are still strong with a mainlandbased ＇brand ambassador’ on hand to ensure the business adheres to its ethos of creating innovative hearthbaked pizzas a slice of PR blurb that Simpson insists lives up to the hype They are very innovative he says The problem with most fast food places is that they use the same sauce on every pizza and just change the toppings Every one of our 16 pizza sauces is a unique recipe that has been formulated to complement the toppings perfectly The largely local customer base evidently agrees and on Saturday and Sunday at least the place is teeming The kidseatforfree policy at weekends is undoubtedly a big draw as well as is the spacious secondfl oor layout overlooked by a canopy of green from Fuxing Park over the road The company is also focusing on increasing brand recognition and in recent years has taken part in outside events such as the regular California Week Still the sta are honest enough to admit that business could be better as good in fact as in CPK’s second outlet in the popular Kerry Parkside shopping mall in Pudong Sinan Mansions has really struggled to get the number of visitors that were envisaged when it first opened and it hasn’t been easy for any of the tenants here adds Simpson We’re planning a third outlet in the city in 2015 and we will probably choose a shopping mall again because of the better foot traffic The tearooms once frequented by Coco Chanel and Marcel Proust are upping sticks and coming to Shanghai Xu Junqian visits the Parisian outpost with sweet treats One thing the centuryold Parisian tearoom Angelina has shown is that legendary fashion designer Coco Chanel not only had style and glamor but also boasted great taste in food pastries in particular One of the most popular tearooms in Paris Angelina is famous for having once been frequented by celebrities such as Chanel and writer Marcel Proust Now Angelina has packed up its French ambience efficient service and beautiful comforting desserts and flown them to Shanghai At the flagship dinein and takeout space in Shanghai everything mimics the original tearoom designed from the beginning of the 20th century in Paris the height of Belle Epoque The paintings on the wall for example are exactly the same as the one that depicts the landscape of southern France the hometown of the owner and the small tables are intentional imitations of the ones that Coco Chanel once sat at every afternoon for hot chocolate The famous hot chocolate known as L’Africain is a luxurious mixture of four types of cocoa beans imported from Africa blended in Paris and then shipped to Shanghai It’s sinfully sweet rich and thick as if putting a bar of melting chocolate directly on the tongue and the fresh whipped cream on the side makes a light but equally gratifying contrast It is also sold in glass bottles as takeaway The signature MontBlanc chestnut cake consists of three parts the pureed chestnut on top the vanilla cream like stuffing and the meringue as base Get all three layers in one scoop not only for the different textures but also various flavors of sweetness The dessert has maintained its popularity for a century even in a country like France perhaps the world’s most competitive place for desserts A much overlooked pairing is the ParisNew York choux pastry and N226 chocolate flavored tea The choux pastry is a mouthful of airy pecanflavored whipped cream while the tea a blend of black teas from China and Ceylon cocoa and rose petals offers a more subtle fragrance of flowers and chocolate Ordering these two items featuring a muted sweetness makes it easier for you to fit into your little black dress Breakfast brunch lunch and light supper are also served at the tearoom a hub of many cultures and takes in a mix of different styles of French cuisines according to the management team The semicooked foie gras terrine is seductive and deceptive It’s generously served at the size and shape of a toast while the actual brioche toast is baked into a curved slice dipped with fig chutney The flavor however is honest strong smooth and sublime And you don’t actually need the toast for crunchiness This is the season for high teas with dainty cups of fine china and little pastries that appeal to both visual and physical appetites But there is one high tea with a difference and Pauline D Loh finds out just exactly why it is special Earl Grey tea and macarons are all very well for the crucial recuperative break inbetween intensive bouts of holiday season shopping And for those who prefer savory to sweet there is still the selection of classic Chinese snacks called dim sum to satisfy and satiate High tea is a meal to eat with eye and mouth an inbetween indulgence that should be light enough not to spoil dinner but sufficiently robust to take the edge off the hunger that strikes hours after lunch The afternoon tea special at ShangXi at the Four Seasons Hotel Pudong has just the right elements It is a pampering meal with touches of luxury that make the high tea session a treat in itself Whole baby abalones are braised and then topped on a shortcrust pastry shell a sort of Chinese version of the Western volauvent but classier Even classier is the dim sum staple shrimp dumpling or hargow upgraded with the addition of slivers of midnight dark truffles This is a master touch and chef Simon Choi who presides unchallenged at ShangXi has scored a winner again Sweet prawns and aromatic truffles — what’s not to love His masterful craftsmanship is exhibited in yet another pastry — a sweet pastry that is shaped to look like a walnut but which you can put straight into the mouth It crumbles immediately and the slightly sweet nutty morsel is so easy to eat you’ll probably reach straight for another My favorite is the dessert that goes by the name yangzhi ganlu or ambrosia from the gods The hotel calls it chilled mango cream with sago pomelo and bird’s nest – made with ingredients that resonate with every female soul It does taste like ambrosia with the sweetsour fragrance of the mango forming the first layer of taste and sensation and the pomelo sacs and sago pearls providing the tactile contrast The bird’s nest — it’s the ingredient that gilds the lily since it is supposed to nourish and nurture a perfect complexion For those unfamiliar with this exotic ingredient the bird’s nest is not a bundle of twigs but is instead the dried secretion that cave swifts use to build their nest Technically it’s bird saliva but the Chinese believe that it has collagenboosting properties essential to beauty To me it just tastes good adding a slight gelatinous crunch to the back of the teeth There is also a baked mushroom puff pastry that includes the highly prized Matsutake or pine mushroom You also get a choice of teas but I strongly recommend the aged Pu’er from Yunnan province It is a mellow tea that will go perfectly with the rich little nuggets and will warm you up on a cold afternoon Incidentally the general guide is green tea such as Longjing or Dragonwell for the hot season semifermented teas like Wulong or Iron Buddha for autumn and more warming teas like Pu’er for winter The ShangXi afternoon tea costs 228 yuan (37) per person and 388 yuan for the more opule
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《香当网》用户分享的内容，不代表《香当网》观点或立场，请自行判断内容的真实性和可靠性！
该内容是文档的文本内容，更好的格式请下载文档