过电流保护的灵敏度做后备保护时要求为() A.1.2 B.1.5 C.2.0

题型:单项选择题

问题:

过电流保护的灵敏度做后备保护时要求为()

A.1.2

B.1.5

C.2.0

考点:接触网作业车乘务员接触网作业车乘务员题库
题型:单项选择题

阅读理解。

      I am Alice. Today the clothes at Beauty Clothes Store are on sale. So I want to buy some clothes

for my grandparents, my parents and myself.  Let me have a look.  This yellow sweater is at a very good

price-only 15 dollars. And it's OK for my grandfather. For my grandmother,1 want to buy these black

shoes. They are comfortable(舒适的).

     How about this white T-shirt? Oh, my father can wear(穿)it for playing basketball. And there are many socks in green, yellow, black, red and white.I know my mother likes red very much, s0 1 will buy the red ones.  I need pants, so I'Il take these blue one.

根据短文内容,完成下列句子。

1. Iwant to buy a yellow_____for my grandfather.

2. My mother like_____very much.

3. I'll buv black shoes for my_____.

4. My father can wear a white_____for playing basketball.

5. I'll take _____ pants for myself.

题型:单项选择题

1 mol CO和1 mol CO2具有相同的[ ]

①分子数 ②原子数 ③C原子数 ④O原子数

A.②④

B.①③

C.①④

D.①②

题型:单项选择题

饮入汽油、煤油等有机溶剂可先服用液体石蜡150~200ml。使其溶解而不被吸收,然后进行洗胃

题型:单项选择题

喉阻塞一殷可分为四度,其主要依据为()。

A.病程长短

B.喉腔大小

C.病变范围

D.呼吸困难程度

E.声嘶程度

题型:单项选择题

节肢动物的神经系统为()

A、链状神经系统

B、网状神经系统

C、环状神经系统

D、背中空神经管

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