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【单选题】
He _____ home once a week, but after entering middle school, he _____ home once a month. [ ]A.
was used to go, was used to go
B.
used to go, was used to go
C.
was used to go, used to
D.
used to go, was used to going
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举一反三
【简答题】泛素化途径(ubiquitination pathway)
【单选题】Which of the following describing ubiquitination INCORRECTLY?
A.
Determines whether a protein is to be degraded
B.
Is regulated by sequential activity of E1, E2, and E3
C.
E3 ubiquitin ligases determine substrate specificity
D.
Can be reversed by the activity of deubiquitinases
【简答题】ubiquitination;ubiquitinoylation（泛素化）
【单选题】Universities usually give diplomas or certificates to students who complete course requi-rements adequately.
A.
responsibly
B.
sufficiently
C.
patiently
D.
successfully
【单选题】Which of the following statements is NOT true?
A.
Continuous computer calculations are required for the automatic blind landing of an aircraft.
B.
Military applications of computers require their very fast response ability.
C.
Scaling down of all dimensions of a computer may result in faults developing.
D.
The development to integrated circuits contributes a lot to the miniaturization of computers.
【单选题】Applications have poured in _________ assignments to remote regions of the country.
A.
requiring
B.
begging
C.
requesting
D.
awaiting
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