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【单选题】
西班牙的倭马亚王朝曾经繁荣一时，其首都也与当时的君士坦丁堡、巴格达、长安并称为当时世界的四大，请问当时西班牙的首都是（）。A.
马德里
B.
巴塞罗那
C.
巴列卡诺
D.
科尔多瓦
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反馈参考答案：
举一反三
【单选题】The only way to stop the spread of aerosols in the atmosphere,according to Dr Rasool and Dr Schneider, is to use（ ）.
A.
fossil fuels.
B.
electric power.
C.
nuclear energy.
D.
coal power.
【单选题】目前已知的生物毒素中毒性最强的是
A.
霍乱肠毒素
B.
白喉外毒素
C.
破伤风痉挛毒素
D.
肉毒毒素
E.
猩红热毒素
F.
: D
G.
程度:
H.
解析:
I.
:单选题
J.
、流行性斑疹伤寒的病原体是 K. 普氏立克次体 L. 恙虫病立克次体
【简答题】The distributor shall sell the products only to those retailers who under a written agreement with the distributor shall consent to resell the product only in the territory and only at the retail pric...
【单选题】The only way to solve the problem of office security was to put all important papers in the safe and allow only those present at the meeting to have the key to the safe．
A.
Right
B.
Wrong
C.
Doesn't say
【单选题】He hurried to the station the train had left.
A.
having been told
B.
telling
C.
only to be told
D.
only to tell
【简答题】流体可压缩性小的,声速( ),很弱扰动波传播得快。
【单选题】I don't suppose you are serious,__________?
A.
aren't you
B.
don't I
C.
do I
D.
are you
【简答题】目前已知毒性最强的生物毒素是（），其毒性比氰化钠强（）倍.
【单选题】I don’t suppose you are working today,____?
A.
do I
B.
aren’t you
C.
are you
D.
don’t I
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