皮皮学，免费搜题
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【单选题】
按皮亚杰的观点 2~7岁儿童的思维处于( ) 2014下 18A.
具体运算阶段
B.
形式运算阶段
C.
感知运算阶段
D.
前运算阶段
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】Why do the tourists don't want to go to Mini Siam?
【简答题】Why do the tourists have a great appetite today? The tourists climbed a mountain this morning and became really _____________.