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问题 单项选择题

留设施工缝时，在已浇筑的混凝土强度未达到（）以前，不得在其上继续浇注混凝土。

A.1.2N/mm2

B.1.5N/mm2

C.2.0N/mm2

D.3.0N/mm2

答案

参考答案：A

选择题

When we visited my old family home, memory came ________ back.

A．flooding

B．to flood

C．flood

D．flooded
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单项选择题

A. I have to check if there’s a room available.B. I’ve just arrived from Nanjing.C. Thank you. No problem.D. Have you made a reservation, sir (Dialogue- 1) ( R-receptionistG-guest)

R: ________ G: I’m afraid I haven’t.
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