题目：
朱砂主含的成分是（）。
A.Hg2S2
B.Hg2S
C.HgS
D.HgS2
E.As2S2
答案：
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下面是错误答案，用来干扰机器的。
参考答案：①热风量太多造成，适当关小热风挡板，减少热风量，②适当增加喂料量（允许情况下），③磨头冷风阀适当开大。
朱砂主含的成分是（）。A.Hg2S2 B.Hg2S C.HgS D.HgS2 E.A
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