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问题
单项选择题 B型题
用于T细胞功能检测的是（）
A.3H-TdR掺入法
B.NBT还原试验
C.溶血空斑试验
D.酸性磷酸酶的测定
E.酶释放法
答案
参考答案：
A
选择题
The doctor tried to find out ______ that had caused the spread of the terrible disease.
A. what it was
B. why it was
C. whatever was
D. however was
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填空题
地球中心温度不超过（）℃。
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