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【单选题】
当液压回路处在如下状态时，液压缸的活塞将向哪边运动？A.
向左
B.
向右
C.
静止不动
D.
无法判断
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皮皮学刷刷变学霸
举一反三
【单选题】. _____ all over the hills and around the lake are wild flowers of different colors.
A.
Grow
B.
To grow
C.
Growing
D.
Grown
【简答题】电流分直流和交流两大类,凡电流的大小和方向都随时间的变化而变化的电流称为 电流,;凡大小和方向恒定不变的电流称为 电流,。
【单选题】A year earlier, Amelia had become the first woman passenger ____ across the Atlantic.
A.
fly
B.
flying
C.
to fly
D.
flown
【简答题】电流分 和 两大类。 ,简称 ;凡 ,简称 。
【单选题】Every passenger boarding the Titanic filled with confidence that the ship was unsinkable.
A.
was
B.
had been
C.
has been
D.
is
【多选题】When there is something wrong with a passenger’s IC card, what should a station officer do?
A.
A station officer should check if the passenger touch the card in the right way.
B.
A station officer should guide the passenger to the customer service center to change the card If the passenger’s card is broken.
C.
A station officer should guide the passenger to the ticket office to check the card If there is no entrance on the passenger’s card.
D.
A station officer should ask the passenger to buy another ticket right away.
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