皮皮学，免费搜题
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【多选题】
引起硅酸盐水泥体积安定性不良的原因是水泥中有过量的( )。A.
游离氧化铁
B.
游离氧化钙
C.
游离氧化镁
D.
石膏
E.
氯化钠
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【简答题】—Does he tell you if he _____ tomorrow? —No, he doesn't. But if he _____ , I'll call you up. [ ] A. will come; will come B. comes; comes C. will come; comes D. comes; will comes
【简答题】'Who is responsible for sending out misinformation?' 'Most of the fault lies _____ the administration.' A．in B．to C．on D．with
【单选题】Why hasn’t he come?________ on time, we would have to put off the trip.
A.
If he doesn’t come
B.
If he will not come
C.
If he didn’t come
D.
If he wouldn’t come
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