瞬变体系

将下列画线字和读音连起来。  

1．埋伏       a．mò        5．拧下来      e．dìng 

2．埋怨       b．mái       6．拧干          f．dīng 

3．磨坊       c．mó        7．钉住         g．níng 

4．磨刀       d．mán      8．钉子          h．nǐng

This is the best way I could think of ______ him ______ computer games.[ ]

A. to stop; playing

B. stopping; playing

C. stop; to play

D. stopping; to play

Space exploration has been made __________ with the development of modern science and technology.

A．it possible

B．it was possible

C．that possible

D．possible

肾脏调节血液pH是通过（）

A.排泄固定酸保留并维持血中碱储

B.氯离子重吸收

C.钠钾交换

D.碳酸氢根离子的重吸收

E.以上都不是

当水面宽大于100米时，在一个监测断面上设置的采样垂线数是（）条。

A.5

B.2

C.3