起钻最大量的抽吸作用,发生在钻头()的时候。A.经过套管鞋 B.经过缩径井段 C.经

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问题:

起钻最大量的抽吸作用,发生在钻头()的时候。

A.经过套管鞋

B.经过缩径井段

C.经过狗腿处

D.刚离开井底

考点:石油钻井工考试石油钻井工考试题库
题型:单项选择题

Can you tell me ________?

A.what are they doing that for

B.why they are doing for

C.why are they doing that

D.what they are doing that for

题型:单项选择题

正常成人骨髓造血分布区域下列不符合的是()

A.胸骨

B.脊椎骨

C.肋骨

D.下肢股骨远心端

E.颅骨

题型:单项选择题

第二节:语言结构(共10小题,每小题1.5分,满分15分)    阅读下面短文,

根据上下文在空白处填上适当的词,或使用括号中的词语的正确形式填空。

When I was a ten-year-old girl, I was once asked to deliver a speech titled “A Real Test in My Life”. To talk before the whole class! Just imagine how   31   (terrible) shy I was the moment I thought of that   32     so many eyes fixed upon me. I had no other choice, though. First I was to draft the speech and that was just a piece of cake for me, because I was a good writer-something to pride myself in. But the hard part   33   (lie) in my oral presentation; to read from   34   paper was not allowed; I had to give the speech   35   my memory and in front of such a big audience! A real trial began when I stood on the platform with my legs   trembling and my mind blank. How much time had passed by, I didn’t know. My listeners were still waiting, patiently and without any signs of rushing me. Gradually I found   36   back, giving out my speech with difficulty. Finally I finished. After   37   seemed to be a hundred years, I found my audience applauding. I made it! From then on, my fear of talking before an audience   38   (appear). Actually with my confidence building   39   , I now turn out to be a great speaker. Looking back, I know the greatest difficulty on our way to success is our fear. Overcome it,   40   we will be able to achieve our goals.

题型:单项选择题

()是寄居在人体一定部位的正常菌群相对稳定,正常情况下不表现致病作用, 只有当机体免疫力降低、寄居部位发生改变或菌群失调时方可致病。

题型:单项选择题

关于乱用关键字,以下描述正确的是?()

A.扣除6分

B.在同一双鞋子的标题中使用:运动鞋、球鞋、板鞋等字眼

C.在店铺页面公示:OEM原单货、厂家尾单…等信息

D.以上说法都正确

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