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【单选题】
银针是( )形状。A.
微卷曲
B.
C.
满披，其形如针
D.
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【单选题】Earth has an atmosphere, which protects the surface from harmful rays.
A.
minerals
B.
substances
C.
gases
D.
beams
【简答题】Overweight has been a great concern for some people. In an attempt to keep normal weight, people have 48 tried various methods. Nevertheless, not all the ways are 49 when it comes to health....
【判断题】The typical North American diet mainly consists of fast food which are low in substances that can cause health problems. ()
A.
正确
B.
错误
【单选题】国民党一大是中国民主主义革命时期一个具有重大意义的事件,关于这次大会表述正确的是( )
A.
会议召开于1924年初的上海
B.
会后马上就进行了北伐
C.
会议召开标志着三民主义的诞生
D.
会上国共实现了第一次合作
【单选题】What does the professor mean when he says this?
A.
Little is known about defining a substance as an air pollutant.
B.
The substance isn't an air pollutant when there is a very little in the air.
C.
The substance can't be judged to be an air pollutant only from its actual concentration level.
D.
The actual concentration level means little to peopl
【单选题】What does the professor mean when he says this?
A.
Little is known about defining a substance as an air pollutant.
B.
The substance isn't an air pollutant when there is a very little in the air.
C.
The substance can't be judged to be an air pollutant only from its actual concentration level.
D.
The actual concentration level means little to people.
【单选题】Which of the following words stands for“-ine”
A.
kidney
B.
subordinate or auxiliary
C.
a substance of a particular class
D.
a chemical substanc
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