单项选择题

It is these poisonous products ______ can cause the symptoms of the flu, such as headache and aching muscles. A) who B) that C) how D) what

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单项选择题

Which molecule is not included in RMH immune marker scoring system for CLL?

A．CD23
B．CD103
C．CD5
D．CD22

六价铬比三价铬毒性大，五价砷比三价砷毒性大。
正确
错误

答案：错误