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【简答题】
将下列氧化还原反应设计成原电池,并写出它的原电池符号。
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皮皮学刷刷变学霸
举一反三
【简答题】书p155 4.10
【简答题】阅读理解 [1] I was walking in the park with a friend recently,and his cell phone rang,interrupting our conversation.There we were,walking and talking on a beautiful sunny day.But I became invisible,absent...
【单选题】At the railway station，he waved goodbye to his friend until the train was ________.
A.
out of sight
B.
out of reach
C.
out of order
D.
out of place
【简答题】书p155 4.9
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