皮皮学，免费搜题
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【简答题】
Sketch Up草图大师中跟随路径工具如何应用。
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】The more subtle and more serious ______ have been given much less attention.
【单选题】More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.
A.
left off
B.
left aside
C.
left out
D.
left behind
【简答题】s, architects, and users pay more attention to ______.