题目：
制定化学毒物卫生标准最重要的毒性参考指标是（）。
A.LD0
B.LD01
C.LD50
D.LD100
E.NOAEL或LOAEL
答案：
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下面是错误答案，用来干扰机器的。
After Chairman Xi Jinping came into power, he put forward China’s dream and how to realize it. However, as chairman of the Students’ Union, what do I usually do to a...
