题目内容

流体在圆管内的流动在阻力平方区,如仅使流速增加一倍,则流动阻力损失为原来的____倍。

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局部阻力的计算方法有和。

Direction: Complete each unfinished sentence with a word, phrase, or structure from the box in the proper form.apply for, get to one’s feet, survive, attach (great) importance to, have much in common, being, judging by, competent, not so much...but the fact that, a crocodile of, ranging in price/age1.Usually the interviewer _____ the educational background, abilities, interests and past experiences of the applicant.2.Few people in that village the terrible famine of 1962.3.His efforts to get the job were futile because there were a lot of young men who _ the job.4.Great minds think alike. Experienced teachers _ when they talk about the teaching set-up.5. the way she prepares the meal, we can say that she must have been trained in a good restaurant.6.The interviewee is not supposed to _ before the interviewer does so.7.There are all kinds of suits for both men and women in the First Department Store, _ from 350 to 1,500 yuan.8.Gone are the days when a mother made her way home followed by _ children, _ from two to ten.9. _ completely incompetent for the job, he was discharged.10.He was dismayed. It was _ having to teach the children at three levels, _____ he had to teach two subjects at which he had been incompetent at school

input的TYPE属性返回值range可以定义输入类型为（）

A. 网站网址
B. email地址
C. 时间
D. 滑条控件

要定义email地址输入框可以使用下面哪一个代码（）。

A.
B.
C.
D.