桶身和地板的卷封咬口应为（）层。A、2 B、3 C、4 D、5

看图填词。

     阅读下面短文，并借助上下文和插图补充所缺信息。每个空格只能填写一个形式正确、

与短文内容意思相符的单词。

       It's 1____ o'clock. It's for 2____.You can see two taxis in front of Ted's 3____.Oh, there are lots of

  people in it. A young woman is 4____ at the table. She has long 5____ hair. And she wears 6____.

  There is a small boy with 7____ hair next to her. Maybe he is her son. He is 8____.On the table you

  can see two plates of 9____.Under the table, there is a 10____.

对特殊条件下的流量测验，如洪水暴涨暴落或有水草、漂浮物、严重流冰等情况，为了取得资料，测速历时可以缩短，但不应少于（）。

A、20s

B、30s

C、40s

D、50s

由于资源不足导致的RRC连接失败属于哪一类原因？（）

A.noreply

B.拥塞

C.未定义

D.noavailableresource

断层的几何三要素是指（）、（）和（）。

塔式起重机塔身承受载荷的种类和特点？