皮皮学，免费搜题
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搜题
【单选题】
葡萄糖溶液与试剂反应生成的氧化亚铜沉淀是( )A.
深蓝色
B.
黑色
C.
砖红色
D.
红棕色
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】---Where John? ---In the library. He there for an hour.
A.
has been, has gone
B.
is, has been
C.
was, went
D.
had been, went
【单选题】—Do you know _____ now? —Yes, in the People's Hospital. [ ]
A.
where is John working
B.
where did John work
C.
where John is working
D.
where John worked
【单选题】-Where John?一In the library. He there for an hour.
A.
has been, has gone
B.
is, has been
C.
was, went
D.
had been, went
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