控制导线允许载流量的主要依据是导线的最高允许温度。钢芯铝绞线

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问题单项选择题

控制导线允许载流量的主要依据是导线的最高允许温度。

钢芯铝绞线和钢芯铝合金绞线可采用( )。

A．70℃；
B．75℃；
C．80℃；
D．90℃。

答案

参考答案：A

阅读理解

阅读短文，回答下列问题。

It's Saturday morning. Mrs Edwards opens the window and looks outside. She is very happy. "It's going to

be a beautiful day!" She wakes up her small son at seven and says, "Get up, Teddy. We are going to the zoo

today. Wash your hands and face and have your breakfast quickly. We are going to New York by car."

Teddy is six years old. He is very happy. He gets up and washes his hands and face quickly. "Mum, let's

go." "But your breakfast?" "I can have it in New York. Let's go."

1. What day is it today?

2. What's the weather like today?

3. Where will they go?

4. What should Teddy do after he gets up?

单项选择题 A1/A2型题

下列有关红细胞渗透脆性试验条件，哪项是不正确的（）

A.pH7.0PBS

B.37℃

C.24小时

D.540nm测定

E.绘制曲线