皮皮学，免费搜题
登录
搜题
【单选题】
铣削纯铜材料时，可以用（）的混合油作为切削液，也可以用润滑性好的极压乳化液充分冲注，以获得较小的表面粗糙度。A.
汽油
B.
柴油
C.
煤油、机油
D.
植物油
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】it rain tomorrow, we should have to put off the visit to Mountain Tai.
A.
Were
B.
Should
C.
Would
D.
Will
【单选题】The crazy fans ______ patiently for two hours, and they would wait till the movie star arrived.
A.
were waiting
B.
had been waiting
C.
have waited
D.
would wait