根据《水工碾压混凝土施工规范》DL/T5112-2000,碾压混凝土坝的混凝土抗冻、抗渗检验的合格率不应低于()。
A.60%
B.70%
C.80%
D.90%
参考答案:C
_____ you have the chance to study, you’d better make full use of your time.
A.Even if
B.Now that
C.In case
D.So that
气缸圆度一般不超过()。
A.0.02-0.03mm
B.0.03-0.04mm
C.0.04-0.05mm
D.0.05-0.06mm