ACP与ALP作用类似,主要区别在于()
A.最适pH不同
B.所作用的底物种类相近
C.稳定性不同
D.组织来源不同
E.缓冲液种类不同
参考答案:A, C, D, E
Jenny is on holiday now. I wonder _______. [ ]
A. when she will come back
B. when she came back
C. when will she come back
D. when did she come back
在受弯构件中,木材表面可以允许有小型的活结,但应放置在受拉部位。