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【简答题】
继电器是一种根据____(电流、电压)或非电量(时间、速度、温度、压力等)的变化自动接通和断开____电路,以完成控制或保护任务的电器。
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举一反三
【多选题】What's the pPurpose of writing a précis?
A.
to state the important or main ideas of the original
B.
the reader can spend less time in reading
【单选题】Writing is a slow process, requiring ______ thought, time, and effort.
A.
significant
B.
enormous
C.
considerable
D.
numerous
【单选题】He had a reputation for being a bit slow-witted but it didn't ______ him in the least.
A.
prevented
B.
harness
C.
fluctuate
D.
perturb
【单选题】Read "Zhaozhou Qiao" and complete the following statements by choosing the proper answer from A, B, C and D. Zhaozhou Bridge leads the word in bridge construction because of its being .
A.
the longest symmetrical arch bridge
B.
the oldest stone-arched bridge
C.
the oldest open-spandrel bridge
D.
best-proportioned bridge
【单选题】The Zhaozhou Bridge , the world's oldest stone segmental arch bridge, is located in____________.
A.
Hebei Province
B.
Shandong Province
C.
Shanxi Province
D.
Hubei Province
【单选题】Writing is a slow _____, requiring considerable thought, time and effort.
A.
process
B.
work
C.
procedure
D.
progress
【单选题】Coal was formed out of dead forests by a long and slow().
A.
press
B.
procedure
C.
success
D.
process
【单选题】With a history of more than 1,400 years, ZhaoZhou Bridge is the _______ stone arch bridge in the world
A.
old
B.
older
C.
oldest
D.
elder
【单选题】Zhaozhou Bridge ( )in Sui dynasty is a stone bridge.
A.
to be built
B.
being built
C.
built
D.
building
【简答题】Zhaozhou Bridge, a _____ arch bridge, is still being used today.
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