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【单选题】
当液压缸活塞所受的外力一定时，活塞的有效作用面积越大，其所受的压力就（）（是液压系统中压力是由负载决定的）A.
越大
B.
越小
C.
不变
D.
先小后大
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举一反三
【单选题】She ____________ visits the house by the riverside.
A.
frequently
B.
falter
C.
finalize
D.
functionally
【简答题】She ____________ visits the house
by the riverside.
【单选题】– Where did she go on vacation? – .
A.
She stays at home
B.
She visits her uncle
C.
She went to New York
D.
She wants to go to Hainan
【简答题】A．Next year. B．Soon. C．When she finishes writing. D．After he visits her.
【单选题】______ of potential er on late night visits to ATMs, she didn’t dare to go without his boy friend ______ her.
A.
Warned; accompanied
B.
Having warned; accompanying
C.
Warning; accompanied
D.
Having been warned; accompanying
【单选题】When she visits the Kennedy Space Centre, Victoria will be able to______.
A.
send messages to satellites
B.
learn something new about the space
C.
go aboard a spacecraft
D.
operate Mission Control
【简答题】A．She eats out at a restaurant. B．She visits close relatives. C．She goes to see a movie. D．She holds a dance party.
【单选题】When she visits the Kennedy Space Centre, Victoria will be able to
A.
send messages to satellites.
B.
learn something new about space.
C.
go aboard a spacecraft.
D.
operate Mission Control.
【单选题】Sue is from the USA, but she _______ in Beijing now. [ ]
A.
was born
B.
lives
C.
comes
D.
visits
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