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【判断题】
一级保养是指除日常保养内容外，由设备外部进入内部，根据设备使用情况拆卸、清洗零部件，调整间隙，清除表面油污，疏通油路等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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皮皮学刷刷变学霸
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A.
a kind of
B.
a set of
C.
a part of
D.
an array of
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【简答题】Experts say the American state of Hawaii has been invaded (入侵)by a small frog called the coqui (ko--kee). There may be millions of the small frogs in Hawaii. However, they do not belong there. They ar...
【简答题】The frog found a ____, the cat found a ____, the bird found a ____ and the dog found a _____.
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