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【单选题】
柴油机工作时,柴油与空气在( )内混合。A.
汽油泵
B.
滤清器
C.
油管
D.
汽缸
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】0502P149 ★★盘点的主要内容?
【单选题】Energy will be one of the defining issues of this century. One thing is clear: the era of easy oil is over. What we all do next will (1)_____ how well we meet the energy needs of the entire world in t...
A.
decline
B.
determine
C.
declaim
D.
decide
【单选题】Energy will be one of the defining issues of this century. One thing is clear: the era of (1)_____ oil is over. What we all do next will determine how well we meet the energy needs of the entire world...
A.
fossil
B.
eternal
C.
easy
D.
formidable
【简答题】传感器是能感受规定的( )并按照一定规律转换成( )的器件或装置。
【简答题】直流电流用字母()表示,交流电流用字母()表示
【简答题】直流电用字母()表示
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