窗与窗之间和窗与门之间的都称为()。
A.窗墙
B.门窗墙
C.窗间墙
D.承重墙
参考答案:C
I would have accompanied you to the cinema yesterday, but I ______ no time.
A.had had
B.could have had
C.might have had
D.had
在脂酰CoA的β-氧化过程中,每经过一次循环,碳链将减少一分子的()
A.甲酰CoA
B.乙酰CoA
C.丙二酰CoA
D.丁酰CoA
E.CO