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【判断题】
共价键类型可以分为 σ键和π键,π键的键能小于σ键的键能,因此π键的稳定性弱于σ键。A.
正确
B.
错误
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【单选题】The moon turns round the earth ， just _____ the earth circles round the sun .
A.
therefore
B.
as
C.
thus
D.
so
【单选题】Our teacher told us that the moon _________ round the earth.
A.
went
B.
turned
C.
go
D.
turns
【简答题】A．The water turns gray. B．It grows again. C．Life on earth improves. D．Life on earth dies.
【单选题】What a lovely toy race car! Could you please tell me ( ) ?
A.
why did you get it
B.
when will you get it
C.
where you got it
D.
how will you get it
【单选题】Questions 11 ~ 13 are based on the following dialogue about buying cars. 11. What kind of car does the woman plan to buy?
A.
A wagon（货车）.
B.
A sports car.
C.
An estate car(旅行轿车).
D.
An energy-saving jeep.
【简答题】11. My neighbor has
a 1965 Ford Mustang, ____ is a classic American car.
【单选题】It is the theory ____the earth turns around the sun____ changes the world. [ ]
A.
that; what
B.
what; that
C.
that; which
D.
that; that
【简答题】A．The water turns gray. B．It grows again. C．Life on earth improves. D．Life on earth dies.
【简答题】11. Paolo usually washes his car on weekends, but last
weekend he ____ it.
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