基础中纵向受力钢筋的混凝土保护层厚度应按设计要求，且不应小于

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问题单项选择题

基础中纵向受力钢筋的混凝土保护层厚度应按设计要求，且不应小于( )；当无垫层时，不应小于( )。

A．30mm；50mm

B．20mm；40mm

C．40mm；70mm

D．50mm；100mm

答案

参考答案：C

填空题

根据首字母及中文提示写出单词的适当形式。

1. Our teacher lives n______.

2. We think the Chinese food is w______.We all love it.

3. It's a fine and s______ day, isn't it?

4. There's nothing ______ (剩下) in the fridge.

5. My mother______ (订购) milk for me as breakfast.

6. We are going to the park i______ of staying at home.

7. There is much air ______ (污染) in my hometown.

8. I like all the ______ (当地的) food in the restaurants.

单项选择题

（）的长短可反映出制动系调整的状况，特别是制动踏板自由行程调节器调整是否合适。

A.制动系反映时间

B.制动减速度上升时间

C.制动释放时间

D.制动减速度下降时间