泵的工作压头的用途并非是（）。
A.克服吸排管路阻力
B.制造泵内真空
C.克服吸排液面压差
D.提升液体至一定高度
参考答案：B
The workers will go on strike if the demands they __________ are turned down. [ ]
A. put aside
B. put through
C. put forward
D. put away
日本在中国占领区是如何进行残暴的殖民统治的？
