总补体溶血活性的检测终点一般是
A.30%
B.40%
C.50%
D.60%
E.70%
参考答案:C
直接诱导乳糖操纵子转录的物质是
A.葡萄糖
B.阿拉伯糖
C.半乳糖
D.乳糖
E.Cgmp
I like ______ teacher, Miss Morgan.[ ]
A. I music
B. I music's
C. my music
D. my music's