大体积混凝土温控中,降低混凝土入仓温度的措施有______。
A.加冰水拌合
B.采用薄层浇筑
C.预埋水管通水冷却
D.对骨料进行预冷
E.合理安排浇筑时间
参考答案:A,D,E
Having arrived at the earthquake-stricken area, we were led to ____ the homeless people lived. [ ]
A. what
B. in which
C. that
D. where
图为膝跳反射示意图,当橡皮槌敲击①时,神经冲动传递的正确顺序是
A.①②③④⑤ B.①⑤④③② c. ①⑤②③④ D.①④②③⑤