题目内容
人体通过清除粉尘的各种作用，只有
2021-10-12
A.不到0.1%的尘粒沉积在肺内
B.0.1%〜0.3%的尘粒沉积在肺内
C.1%〜3%的尘粒沉积在肺内
D.10%〜30%的尘粒沉积在肺内
E.10%〜50%的尘粒沉积在肺内
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