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【简答题】
脱氧核糖核苷中的糖环3'位没有羟基。( )
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反馈参考答案：
举一反三
【单选题】He ___ his leg when he __ in a football match against another school.
A.
broke, played
B.
was breaking, was playing
C.
broke , was playing
D.
was breaking, played
【单选题】听力原文：M: Aren't we supposed to be at Jim's house by five o'clock? W: Five or five-thirty. He said it didn't make any difference. What time did Jim wish these two people to beat his house?
A.
Before five o'clock.
B.
At five o'clock.
C.
After five o'clock.
D.
Any time around five.
【单选题】After the five ,very little of the house _______standing .
A.
remained
B.
kept
C.
rested
D.
left
【简答题】The White House is open to the public ________. A) on weekdays only B) five days a week C) every other day D) on weekends only
【单选题】He had a serious car (accident) last week and (broke) his left leg because he got (drunk) and drove too (fastly).
A.
accident
B.
broke
C.
drunk
D.
fastly
【简答题】解不等式：x（x-3）＜3x（x+2）-2x 2 -3
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