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【判断题】
parent>child选择器中child指parent元素的直接子元素A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】左图给定的是正方体纸盒的外表面，下面哪一项能由它折叠而成？A.B.C.D.左图给定的是正方体纸盒的外表面，下面哪一项能由它折叠而成？
【简答题】阅读理解。 David finished a college and began to work in a middle school when he was twenty-three. Two years later he broke his left leg while he was playing football with his students. They took him to a ...
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