碱液循环泵中碱液流量控制在（） A.6~10m³ B.8~12m³ C.7~10m³

Someone is ringing the doorbell. Go and see__________   [ ]

A. who is he                      

B. who he is  

C. who is it                        

D. who it is

The reason _____ he explained to the teacher was _____ he had forgotten to memorize the new words.[ ]

A. why; because      

B. which; because    

C. /; that        

D. why; that

导线测量的外业工作是（）。

A．选点、测角、量边

B．埋石、造标、绘草图

C．距离丈量、水准测量、角度测量

D．观测、计算、求得各导线点的平面直角坐标

安波在秧歌剧方面的代表作是（），《七月里在边区》.

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