浇筑大体积混凝土应沿高度均匀分段,分层浇筑分段土数目宜减少,每段混凝土厚度应为()。
A.1.5~2.0m
B.1.0~1.5m
C.1.0~2.0m
参考答案:A
--- Would you like to______ Mr. Zhang’s lecture this afternoon?
--- Sorry, I have a class meeting to______.
A.attend; join
B.join; attend
C.join; take part in
D.attend; attend
下列属于东西走向的山脉是[ ]
A.横断山
B.大兴安岭
C.巫山
D.秦岭