发电厂中的主变压器空载时,其二次侧额定电压应比电力网的额定电压()。 A.相等; B

题型:单项选择题

问题:

发电厂中的主变压器空载时,其二次侧额定电压应比电力网的额定电压()。

A.相等;

B.高5%;

C.高10%;

D.低5%;

考点:电气值班员考试电气值班员技师考试电气值班员技师考试题库
题型:单项选择题

阅读理解。

     Hello! My name is Alice Green. Look! This is a photo of my family. These are my grandparents. Jack

is my grandfather, and Mary is my grandmother. This is my father, and his name's Tim. This is my mother,

and her name's Jenny. Those are my aunt and my uncle. My aunt's name is Kelsey and my uncle's name is Bob. That is my cousin. Her name's Sonia. have a happy family. And you?

1. What's your family name?

A. Alice.

B. Green. 

C. Mary.

2. Jack is my_______.

A. grandfather

B. uncle

C. father

3.Jenny's daughter is_______.

A. Mary

B. Kelsey

C. Alice

4._______is my cousin.

A. Mary

B. Kelsey

C. Sonia

5. Tim and Jenny are my ________.

A. cousins

B. grandparents

C. parents

题型:单项选择题
已知幂函数f(x)=xm的图象过点(2,
2
),则f(
1
4
)
=______.
题型:单项选择题

蛛网膜下腔阻滞麻醉后头痛,以下哪项原因可能性最大()。

A.低血压

B.恶心、呕吐

C.麻醉药不纯

D.脑脊液外漏至硬脊膜外腔

E.以上都不是

题型:单项选择题

《医林改错》通气散的药物组成如何?

题型:单项选择题

光敏传感器接受()信息,并转化为电信号。

A、力

B、声

C、光

D、位置

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