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【多选题】
油箱的作用有()。A.
沉淀杂质
B.
分离气泡
C.
散热
D.
储油
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反馈参考答案：
举一反三
【单选题】（辽宁卷） 23 ． Susan decided not to work on the program at home because she didn’t wanther parents to know what she __________.
A.
． has done
B.
． had done
C.
． was doing
D.
． is doing
【简答题】3 4 = () 8 =21÷______=______：24=______%．
【单选题】The football player felt extremely _____________ after they won the game.
A.
luck
B.
lucky
C.
luckily
D.
unlucky
【单选题】Susan decided not to work on the program at home because she didn’t want her mother to know what she _____.
A.
has done
B.
had done
C.
was doing
D.
is doing
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