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【简答题】
What factors are responsible for the difference in the properties of CO 2 and SiO 2 ?
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举一反三
【简答题】A．He thinks David is not reliable. B．He's willing to trust David. C．He has told his doubts to David. D．He thinks David will benefit from this experience.
【简答题】变电所内，高低压配电设备及裸母线的正上方不应安装灯具，灯具与裸母线的水平净距不应小于（）m。
【单选题】As reliable parents, they never ______ to give their son what he is promised.
A.
expect
B.
intend
C.
manage
D.
fail
【单选题】—John is very ______ . —if he promises to do something he’ll do it.
A.
independent
B.
confident
C.
reliable
D.
flexible
【简答题】直流电机 磁场对气隙磁场的影响,称为电枢反应。
【单选题】He had the 'right' accent, ______ middle - class parents in court, reliable witnesses, and he could obviously afford a very good solicitor.
A.
respectable
B.
respectful
C.
respective
D.
respecting
【单选题】John is very ——if he promises to do something he’ll do it .
A.
humour
B.
cautious
C.
modest
D.
reliable
【单选题】John is very _____---if he promises to do something he’ll do it.
A.
incredible
B.
confidential
C.
reliable
D.
flexible
【简答题】直流电机负载运行时,电枢绕组中有电流通过,也产生磁通势,此磁通势影响励磁磁通势产生的磁场,有可能改变气隙磁密分布情况及每极磁通量的大小,这种现象称为____。
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