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1 全球性大气污染问题包括_ 、臭氧层破坏、 _。 2 气体状态污染物指以分子状态存在的污染物,总体上分五类: 、含氮化合物、_ _、碳氧化物。 3 总悬浮颗粒物是指能悬浮在空气中,空气动力学当量直径小于 的颗粒物。
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【简答题】How does the author feel about his country life? (Para. 2-3)
【判断题】肾上腺素即具有弱碱性又具有旋光性。
A.
正确
B.
错误
【单选题】働き......効き目。
A.
疲れてくると、頭の働きが鈍くなる。
B.
このお茶は眠気をさます働きがある。
C.
今日一日の働きで、これしか給料をもらえなかった。
D.
私達のチームが勝ったのは、彼のめざましい働きによるものだ。
【单选题】About 10 16 cell divisions take place in a human body in the course of an average lifetime; thus, every single gene is likely to have acquired a mutation on more than _____ separate occasions in any i...
A.
10 7
B.
10 8
C.
10 9
D.
10 10
【简答题】第16篇 We asked thirty young people between 14 and 18 several questions. All thechildren had computers at home. The average ( 平均) time spent on a computer in a weekwas about 12 hours, with the highest a...
【单选题】The average international runway model has a body mass index (BMI) under 16--low enough to indicate starvation by the World Health Organization's standard. And Record and Austin are worried not just a...
A.
It contributes to many mental illnesses.
B.
It defines the future of the fashion industry.
C.
It has great influence on numerous girls and women.
D.
It keeps many otherwise qualified women off the runway.
【简答题】Surveys of American agers find that about half of them do not get enough sleep on school nights. They get an average of 60 to 90 minutes less than experts say they need. Experts say s are biol...
【简答题】Questions 16 to 19 are based on the following passage. Choosing a college requires that you ask yourself many questions. Who do you want to be? What do you want to do? Where do you want to go in life?...
【简答题】Be serious about safety at school March 29 is National School Safety Day.This year students will learn how to stop school accidents from happening. We should all be serious about school safety.A repor...
【单选题】How does someone love his country according to the text?
A.
To know it more.
B.
To visit various parts of the country.
C.
To know its history, language, arts, geography and music.
D.
All of the above.
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