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【判断题】
辩论是不同的人用一定的理由来说明自己的见解，揭露对方的矛盾，以便最后得到正确的认识或共同的意见。A.
正确
B.
错误
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【简答题】sdgsdf
【单选题】______ the beginning of the 19th century did scientists know that all matter is made up of atoms. [ ]
A.
At
B.
By
C.
Up to
D.
Not until
【单选题】sdfgsdflfg;sdfg;sdlgjweloisd;slglsdfgslertpdfgsdfg;sdfgsd;flgkdflgdflgkd;lfkgdfg;'d
A.
dfgsdfg
B.
sdgsdf
C.
gsdfg
D.
sdfgsdfgsdf
【单选题】On the basis of their models, scientists are of the opinion that______.
A.
the climate of the world should be becoming cooler
B.
it will take thousands of years for the inertia of the earth's climate to take effect
C.
the man-made warming effect helps to increase the solar effect
D.
the new Ice Age will be delayed by the greenhouse effect
【简答题】_____the beginning of the 19 th century did scientists know that all matter is made up of atoms. A,At B,By C,Up to D,Not until
【单选题】On the basis of their models, scientists are of the opinion that______.
A.
the climate of the world should be becoming Cooler
B.
the new Ice Age will be postponed by the greenhouse effect
C.
the warming effect helps to increase the solar effects
D.
inertia of the earth's climate to take effect in thousands of years
【单选题】With the population explosion, scientists will have to ______ new methods of increasing the world's food supply.
A.
come up with
B.
carry out
C.
lead to
D.
stick to
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