皮皮学，免费搜题
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【单选题】
Jackie: It's very useful when I don't have a______ with me.A.
computer
B.
camera
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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.
【简答题】请为你所选择的调研项目设计13个封闭式问题。