施工中钢筋接头应力状态不清的，应按（）处理。
A.受拉
B.受压
C.偏压
D.受剪
参考答案：A
解析：施工中钢筋受力分不清受拉、受压的，按受拉办理。
用适当的词填空。
1. There are about two _______________ (百) students playing on the playground.
2. The mother is _______________ (自豪的) of her son,
because he is very successful in his work.
3. There are many kinds of English _______________ (字典) in this bookstore.
You can choose the one you like.
4. Look at the photo _______________ (仔细地), and you will find our teacher.
5. Would you mind _______________ (打开) the window? We need some fresh air.
人工放起落架时，最后一个人工放起落架手柄拔出后至少多长时间，才将起落架手柄放到”放下位”：（）.
A、10秒
B、15秒
C、20秒
D、25秒
