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【单选题】
Which of the following is NOT mentioned in the passage?A.
New techniques are continually developed and new machines invented for undersea exploration
B.
If not well built, a submersible is likely to get crushed in deep water.
C.
A submersible, when manned, looks very much like a spaceship.
D.
In certain respects, undersea exploration is often faced with the same problem as space travel is.
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举一反三
【简答题】How to change the following double negative sentence ( 双重否定句) into an affirmative sentence (肯定句)? In some countries no major business is conducted without eye contact. (Para. 6)
【简答题】在恒定外压力下，U t =100%之前，土体产生的固结变形，称为______；在U t =100%以后仍在发展的变形部分称为______。
【单选题】下列医院的功能和任务中,向多个社区提供全面连续的医疗护理、预防保健、康复服务的卫生机构的是:
A.
一级医院
B.
二级医院
C.
三级医院
D.
综合医院
E.
专科医院
【简答题】In some countries no insurance companies offer health care because governments have taken over the entire (responsible) ____________.
【简答题】将下列命题改写成“若p，则q”的形式，并判断命题的真假： （1）6是12和18的公约数； （2）当a＞-1时，方程ax 2 +2x-1=0有两个不等实根； （3）已知x、y为非零自然数，当y-x=2时，y=4，x=2．
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