为保证预埋件与主体结构连接的可靠性,连接部位的主体结构混凝土强度等级不应低于()。
A.C15
B.C20
C.C25
D.C30
参考答案:B
She was fine, _______ was wrong with her. [ ]
A. something
B. anything
C. everything
D. nothing
实际干燥过程中,当△<0时,过程线位于等焓线下方,此时()
A.I2B.I2=I1
C.I2>I1
D.I2=I0