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【单选题】
我国研制的( )系列的高灵敏度直流测速发电机,其灵敏度比普通测速发电机高1000倍,特别适合作为低速伺服系统中的速度检测元件。A.
CY
B.
ZCF
C.
CK
D.
CYD
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举一反三
【单选题】_____ keep the insects out, she shut the window. [ ]
A.
So as to
B.
In order that
C.
In order to
D.
For
【单选题】In the streets,____________ was a hard job for the traffic police to keep the traffic in order. [ ]
A.
this
B.
it
C.
that
D.
there
【单选题】In order to keep the line moving, customers with lengthy ________ are required to do their banking inside.
A.
transit
B.
transactions
C.
turnover
D.
tempos
【单选题】How do librarians keep books in order?
A.
They arrange the books in alphabetical order.
B.
They put the books into a card catalogue.
C.
They give a number to each book.
D.
They put the books on the shelves.
【简答题】Users need to wipe ______ from the LED in order to keep it working well.
【单选题】They need ______ fear of heavenly retribution to keep them in ______ order.
A.
a; an
B.
the; ×
C.
a; ×
D.
×; ×
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