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【简答题】
何谓酶?酶促反应的特点是什么?
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反馈参考答案：
举一反三
【单选题】—Why didn't you answer my phone just now? —Sorry．I Shenzhou VII launched on TV and didn't hear the phone．
A.
have watched
B.
watched
C.
was watching
D.
would watch
【简答题】It is not necessary for an air freight agent be acquainted with the matter of containerized service． （ ）
【简答题】It is not necessary to state whether freight has been paid or is paid at destination．（ ）
【单选题】Which statement is TRUE concerned with ears in the future?
A.
It is not necessary to have drivers in cars.
B.
Cars with electric motors will become popular.
C.
Cars will become greener and safer.
D.
Cars will disappear.
【单选题】It is not necessary to carry cash instead of dollar travellers' cheques because the latter can be______．
A.
used for phones, bus fares and hotel reservations
B.
used to pay in restaurants and big stores
C.
used like credit cards, even in remote areas
D.
exchanged easily, even at car rental companies
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