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【多选题】
下列哪些物质可以用化学沉淀法( )。
A.
Hg2+
B.
Cd2+
C.
Pb2+
D.
PO43-
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A.
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B.
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A.
Because there was a lake there.
B.
Because there was a river there.
C.
Because there were a lot of firemen there.
D.
Because there was a path there.
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A.
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B.
拉曼散射
C.
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D.
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【单选题】《击鼓》一诗的来源是国风中的( )
A.
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B.
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C.
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D.
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