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【简答题】
语法单位主要有四级,最大的语法单位是
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举一反三
【单选题】Hardly _____ closed my eyes ___ I began to make this fantastic dream .
A.
had I , when
B.
I had , when
C.
did I , than
D.
I did , than
【简答题】en parlant d'un animal, reconnaître quelque chose, un être vivant, par l'odeur , (v.t.) :
【单选题】利用不同的粒子在离心场中沉降的差别,在同一离心条件下,通过不断增加相对离心力,使一个非均匀混合液内大小、形壮不同的粒子分步沉淀的离心方法是
A.
差速离心法
B.
差速离心法等密度区带离心法
C.
高速离心法
D.
超速离心法
【单选题】__put everything back than the phone rang．
A.
No sooner had I
B.
Hardly had I
C.
No sooner I
D.
Hardly I had
【单选题】got on the train when it began to move．
A.
No sooner had I
B.
I had no sooner
C.
Hardly had I
D.
I hardly had
【单选题】_____ entered the office when I realized that I had forgotten to bring my report.
A.
I hardly had
B.
Had I hardly
C.
Hardly had I
D.
Hardly I had
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