强心甾烯
参考答案:
强心甾烯是指C17侧链为五元不饱和内酯环的甾体类化合物。
you would have to go away.
A.One more word and
B.Say another word
C.With more words and
D.Say more words
制造厂所标称的探头入射角在探测非钢金属材料时,其入射角()。
A.偏大
B.偏小
C.不变
D.任意