爬模施工,混凝土浇筑后,强度达到()以上方可拆模翻倒。
A.0.5MPa
B.1.0MPa
C.2.5MPa
D.5.0MPa
参考答案:C
The students visited a zoo last week and couldn't believe ______ they saw. [ ]
A. that
B. what
C. which
D. /
《公安消防部队机关干部学习规定》中集体学习制度要求集体学习实行考勤登记,因故缺席应当及时补课。