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【简答题】
家有黑兔172只，黑兔的只数比白兔多75只，家有白兔多少只？
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举一反三
【单选题】Which of the following vibrations can be used to distinguish CH 2 =CH-CH=CH 2 and CH 3 CH=CHCOCH 3 ?
A.
The stretching vibrations of = C - H at about 31 00- 3000 cm -1
B.
The stretching vibrations of - C - H at about 30 00 -2800 cm -1
C.
The stretching vibrations of - C =C- at about 165 0 cm -1
D.
The stretching vibrations of - C =O at about 1700 cm -1
【单选题】关于突触的描述,错误的是
A.
仅为神经元与神经元之间的细胞连接
B.
可分为电突触与化学性突触两种
C.
化学性突触由突触前成分、突触间隙与突触后成分构成
D.
突触前成分内含有突触小泡
E.
突触后膜上有特异性受体
【单选题】From the failure of EuroDisney we can learn that
A.
Europeans don't like Disney's cartoon characters.
B.
American and European cultures are not convergent at all.
C.
America and Europe have not so much in common as the company thought.
D.
not all people around the world like cartoons.
【单选题】关于突触的描述,错误的是( )
A.
仅为神经元与神经元之间的细胞连接
B.
化学性突触由突触前成分、突触间隙与突触后成分构成
C.
突触前成分内含有突触小泡
D.
突触后膜上有特异性受体
【单选题】You can buy clothes _______ in Mary’s Store.
A.
the cheapest
B.
the most cheaply
C.
the most cheap
D.
the cheapliest
【单选题】From the passage we can learn that ______.
A.
Amy has never recovered from the shock
B.
Amy changed her job after the accident
C.
Amy lost her memory after the accident
D.
Amy has lived quite a normal life
【简答题】The Young Can't Wait By Severn Cullies Suzuki When you are little, it's not hard to believe you can change the world. I remember my enthusiasm when, at the age of 12, I addressed the delegates at the ...
【简答题】In cities with rent control, the city government sets the maximum rent that a landlord (房东) can charge for an apartment. Supporters of rent control argue that it protects people who are living in apar...
【单选题】Early cancer screening can help reducesignificantly
A.
the death rates for a chronic diseases．
B.
the kinds of cancer attacking people．
C.
the incidence rate for cancer．
D.
the death rate for cancer．
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