气压试验中所用的气体必须是( )。
A.空气
B.压缩空气
C.氮气
D.氨气
参考答案:B
I’m afraid none of them can ________ the machine that has been imported from abroad. Which of the following is wrong?
A.work
B.run
C.turn
D.operate
远志祛痰,开窍之功效可用治()
A.痈疽疮毒, * * 肿痛
B.血虚身疼,风湿痹痛
C.咳嗽痰多,或痰多黏稠咳吐不爽
D.痰阻心窍,癫痫惊狂
E.忿怒忧郁,烦躁失眠