— Jerry, How did Tom the news?

— He said nothing. [ ]

A. replay to

B. contact to

C. answer to

D. respond to

当混凝土强度等级≥C60时，宜采用（）确定立方体抗压强度值。

A.标准试件

B.非标准试件

C.100mm立方体试件

D.与骨料最大粒径相适应的立方体试件