皮皮学，免费搜题
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【单选题】
社会调查研究的准备阶段不包括( )A.
课题的选择
B.
确定及其影响因素的分析
C.
探索性研究
D.
. 假设
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】What did the researchers do after they gave the fish shots ?
A.
They gave all the fish in the fish tank some painkilling shots
B.
They put painkilling medicine in the water of both sides of the fish tank.
C.
They put painkilling medicine in the water of the natural side of the fish tank.
D.
They put painkilling medicine in the water of the empty side of the fish tank.
【单选题】What did Tom and Judy do with the tickets?
A.
They went to see the play.
B.
They gave them away to a close friend.
C.
They threw them away
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