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【单选题】
M7475B 磨床中的电磁吸盘在进行可调励磁时,下列晶体管起作用的是A.
V1
B.
V2
C.
V3
D.
V4
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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】实训二十八 写字效果和放大镜的制作 写字效果.swf 放大镜.swf
【多选题】由乙烯推测丙烯（CH 2 =CH-CH 3 ）与溴水反应产物结构简式正确的是（ ）
A.
CH 2 Br-CH 2 -CH 2 Br
B.
CH 3 -CBr 2 -CH 3
C.
CH 3 -CH 2 -CHBr 2
D.
CH 3 -CHBr-CH 2 Br
【单选题】由乙烯推测丙烯（CH 3 CH=CH 2 ）与溴水反应时，对反应产物的推测正确的是
A.
CH 2 BrCH 2 CH 2 Br
B.
CH 3 CHBr 2 CH 3
C.
CH 3 CH 2 CHBr
D.
CH 3 CHBrCH 2 Br
【简答题】When will he stop working in the department? _________________.
【单选题】He is the most hard-working students in his class. That means he is more hard-working than_______ in his class.
A.
anyone
B.
other students
C.
the other student
D.
the other students
【简答题】He didn't want it to be known that he was too ill to go on working．
【单选题】由乙烯推测丙烯（CH 2 =CH-CH 3 ）与溴水反应时，下列反应产物正确的是 [ ]
A.
CH 2 Br-CH 2 -CH 2 Br
B.
CH 3 -CBr 2 -CH 3
C.
CH 3 -CH 2 -CHBr 2
D.
CH 3 -CHBr-CH 2 Br
【单选题】(No matter how) hard he is working, he will (insist) (on) the principle as (hardly) as he can.
A.
No matter how
B.
insist
C.
on
D.
hardly
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