倒虹管必须做闭水试验。闭水试验应在管道灌满水经()h后进行。
参考答案:24
our Party’s reform policy,the economic situation of our country has already much
better than before.[ ]
A.Owing to;turned on
B.Because of;turned over
C.Despite;turned around
D.Thanks to;turned out
买方占据主导权的市场是( )
A.买方市场
B.卖方市场
C.国家市场
D.商业市场