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搜题
【单选题】
只有在()精度很高时,过定位才允许采用。A.
设计基准面和定位元件
B.
定位基准面和定位元件
C.
夹紧机构
D.
刚度
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】_________ he wasasked why he was late for class, he would answer carelessly, always the samething.
A.
However
B.
Whenever
C.
. whatever
D.
Whichever
【单选题】When Watson enrolled at Brown University in 2009, she couldn’t decide whether to quit acting and go back to campus life temporarily.
A.
T
B.
F
C.
NG
【多选题】下列关于表面活性剂的说法正确的是
A.
表面活性剂的分子量一般低于30
B.
表面活性剂具有双亲性分子
C.
亲水侧为非极性烃链
D.
亲油侧为非极性烃链
E.
亲水侧可以是硫酸及其盐
【判断题】When Rob went to milk the cow alone, he expected that he would have no trouble at all.
A.
正确
B.
错误
【简答题】And not to say he would have imagined ( 9 ) Mount Kilimanjaro.
【单选题】对于表面活性剂,下列说法正确的是( )
A.
能降低溶液表面张力的物质
B.
能增加溶液表面张力的物质
C.
溶入少量就能显著降低溶液表面张力的物质
D.
溶入少量就能显著增加溶液表面张力的物质
【简答题】ATC instructed the pilot to report on short final, he answered which I understood to mean he would do so.
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