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【单选题】
正确判断灰化完全的方法是()A.
一定要灰化至白色或浅灰色
B.
一定要高温炉温度达到525-575℃后灼烧5h
C.
应根据样品的组成、性质观察残灰的颜色
D.
加入助灰化剂使其达到灰白色为止
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皮皮学刷刷变学霸
举一反三
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【单选题】A) They are twins. B) They are classmates. C) They are friends. D) They are colleagues.
A.
They are twins.
B.
They are classmates.
C.
They are friends.
D.
They are colleagues.
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