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【简答题】
我们突然笑起来。 We _________ ___________ laughter.
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反馈参考答案：
举一反三
【简答题】How many cancellations were there at the region's three airports on Tuesday?
【单选题】高钾血症对心肌生理特性的影响是
A.
兴奋性↑传导性↑自律性↑收缩性↑
B.
兴奋性↑传导性↓自律性↑收缩性↑
C.
兴奋性轻症↑重症↓传导性↓自律性↓收缩性↓
D.
兴奋性↓传导性↑自律性 ↓收缩性↓
E.
兴奋性↓ 传导性↑ 自律性↑收缩性↓
【简答题】相对密度的测定方法有 和 。
【单选题】Because of noise pollution，many airports__________ ．A.have to operate for a longer time###
A.
Because of noise pollution，many airports__________ ． A.have to operate for a longer time
B.
can not operate any longer
C.
have to reduce their operation hours
D.
have to close earlier than usual
【简答题】For statistical and administrative purposes, many states divide their airports into 3 major classes .
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