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【单选题】
亚硝酸引起基因突变的机制是( )。
A.
甲基化
B.
脱氨
C.
脱氢
D.
氧化
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参考答案:
举一反三
【单选题】When problems occur, winners take them as ________
A.
excuses for their failures
B.
barriers to greater power
C.
challenges to their colleagues
D.
chances for self-development
【简答题】该图表示几种自然灾害的持续时间,读图完成4—5题。 小题1:图中①②③④四种灾害分别是(  ) A.火山、地震、干旱、洪涝 B.地震、火山、洪涝、干旱 C.干旱、洪涝、地震、火山 D.火山、地震、洪涝、干旱 小题2:蝗灾是最严重的生物灾害,与其发生密切相关的灾害是(  ) A.②③ B.②④ C.①② D.③④
【简答题】2除以一个小数,商一定大于8.2.______.(判断对错)
【单选题】—What were you doing when I phoned you last night? —I _____my painting and was starting to take a bath.
A.
have already finished
B.
was finishing
C.
had just finished
D.
was going to finish
【单选题】I broke him of his bad habit before it could ________.
A.
take away
B.
take off
C.
take back
D.
take hold
【简答题】直接写得数. 0.39÷3.9= 3.7+4.2= 1.8×0.5= 8.2÷8.2+8.2= 2.5×0.4= 4.2×0= 1-0.78= 0.25×0.7×4=
【单选题】Is that for here or__ __? BA. take outB. to goC. to packD. for wrapping up
A.
take out
B.
to go
C.
to pack
D.
for wrapping up
【单选题】下面各式中商最大的是(  )
A.
8.2÷0.1
B.
8.2÷0.01
C.
8.2÷0.001
【简答题】Voici la petite Juliette. _____________ père est italien, ___________ mère est française.
【简答题】2×0.78>8.2______(判断对错)8.2×0.78>8.2______(判断对错)
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