易熔塞的泄放温度，对于充装低压液化气体的容器，应以充装系数为

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问题单项选择题

易熔塞的泄放温度，对于充装低压液化气体的容器，应以充装系数为基础来进行选定。因此，对于槽、罐车其易熔元件的易熔合金熔融温度应为i（）。

A.其设计温度50℃

B.≤75℃

C.65~75℃

答案

参考答案：C

填空题

用所给词的适当形式填空。

1. He said he _____ (give) me the pen the day after tomorrow.

2. He told me _____ (not swim)in the river alone.

3. The old man _____ (buy)a color TV next week,won't he?

4. What _____ your sister _____ (do) at that time?

5. Listen! The children _____ (sing)in the classroom.

6. _____ you _____ (write) when there was a knock on the door?

7. She put the bag on the desk and _____ (leave) for the conceit with her mother.

8. The old woman didn't open the door or _____ (answer) the phone call.

9. She said she _____ (be) better if she went to the hospital earlier.

10. The boy told me that he was going to be a teacher after _____ (finish) his studies.

单项选择题

水泥的( )是评价和选用水泥的重要技术指标，也是划分水泥强度等级的重要程度。

A．烈度

B．强度

C．硬度

D．湿度