问题
单项选择题 B1型题
测定NK细胞杀伤活性（）。
A.E花环实验
B.Western Bloting
C.溶血空斑实验
D.细胞毒实验
E.PHA淋巴细胞转化实验
答案
参考答案：D
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测定NK细胞杀伤活性（）。
A.E花环实验
B.Western Bloting
C.溶血空斑实验
D.细胞毒实验
E.PHA淋巴细胞转化实验
参考答案：D
| 从对话后的方框中选择适当的选项补全对话。 | |
| A: __1__ B: I'm not feeling well. A: You've been like this since you got here, haven't you? B: __2__ A: Do you know why? B: __3__ It's awful. One day it's hot, but the next day it's rainy. No matter what I wear, I'm never dressed properly. A: You haven't learned to predict the weather here. I've been here for eight years, and I never get sick . B: __4__ A: Well, there's a weather hotline. Every morning you can call it to find out what the weather will be like during the day. B: I know that hotline, but I've never called it. I've heard it's expensive.
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