被控开关辅助触点的常开型触点指()。 A.触点状态不带电; B.触点状态所带电压低于

题型:单项选择题

问题:

被控开关辅助触点的常开型触点指()。

A.触点状态不带电;

B.触点状态所带电压低于12V;

C.与被控开关运行状态相反的触点;

D.与被控开关运行状态一致的触点。

考点:用电营销考试用电信息采集用电信息采集题库
题型:单项选择题

Bruce's chocolate

Bruce's favorite food is chocolate.His parent and teacher ofen say that it's ___1___ for his teeth to eat too much chocolate.But he doesn't belive it.He often puts some chocolate in the milk for breakfast, the juice___2__ lunch ,even the soup for supper. His mother has to ___3__ some chocolate in his bag before he goes to school.Sometimes when his mother goes shopping with him,Bruce won't leave the shop ___4__  she buys some chocolate for him.

The little boy  ___5__  back from school with a painful(痛苦的) look yesterday afternoon. A tooth hurt and he had nothing .His mother made some soup for him.But he put some chocolate in it.His father bought some __6__for him,but he put some chocolate in it, __7__ .Of course it was useless(无用) .So the next morning his mother took him to see the __8__ .The dentidt saw there was a cavity(洞) in his bad tooth .So he had to fill(填充) it with something.

“Now,young man,” said the dentist , “what kind of filling(填充物) would you like for that tooth ?”

“__9__,please,”answered Bruce.The dentist and Bruce’s mother were both laughed(大笑).The dentist asked Bruce to eat fresh fruit and vegetable__10__ chocolate. And It’s necessary for Bruce to have healthy eating habits.

小题1:     

A.good

B. bad

C. well

D. better小题2:     

A.for

B. to

C. at

D. with小题3:     

A.throw

B. put

C. buy

D. get小题4:     

A.when

B. until

C. if

D. because小题5:     

A.come

B. go

C. return

D. came小题6:     

A.medicines

B. pill

C. medicine

D. a pill小题7:     

A.also

B. too

C. either

D. as well小题8:     

A.doctor

B. nurse

C. teacher

D. dentist小题9:     

A.Chocolate

B. Milk

C. Fruit

D. Vegetabls小题10:   

A.instead

B. but

C. instead of

D. no

题型:单项选择题

个别项目质控品失控与多数项目失控的差别是()

A.有无分析系统状态的改变

B.可以基本确定分析仪工作状态

C.是否质控物中的一种物质变性

D.是否受到一类物质干扰

E.是否有质控品变更

题型:单项选择题

读句子,体会句中加粗词的表达效果。

1.但笑过之后,每个学生心里都起一股酸涩的感情,同时更增加了对刘老师的尊敬。

__________________________________________

2.当春风吹绿了大地的时候,人们的身心一齐苏醒,一种舒展的快意便上心头。

__________________________________________

题型:单项选择题

蝶阀在()下可以实现良好的密封。

A、高压

B、中压

C、低压

D、关闭

题型:单项选择题

简述透射电子显微镜的分辨本领与加速电压的关系。

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