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【简答题】
设置于两个或数个房间之间（如不同洁净度级别的房间之间）的具有两扇或多扇门的隔离空间是（）。设置气锁间的目的是（）。
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皮皮学刷刷变学霸
举一反三
【单选题】—How can we keep our city clean? —_____.
A.
We can go to school on foot
B.
We can go to school by bike
C.
We can go to school by carpooling
D.
All of the above
【单选题】-How can we keep our city clean. - _________.
A.
We can go to school on foot.
B.
We can go to school by bike.
C.
we can go to work by carpooling.
D.
All of the above.
【简答题】How can we keep bare-root ornamental shrubs in vital condition untilmarketed? _____________A. to dig the plants with as much soil as possible and to let themcling to the roots B. to wrap the root ball...
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