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【单选题】
在氯化铁与氯化铜的混合溶液中加入过量的铁粉,搅拌使其充分反应,所得固体残渣的质量与原铁粉的质量恰好相等,则原溶液中FeCl 3 和CuCl 2 物质的量之比为(    )
A.
2∶7
B.
7∶2
C.
5∶2
D.
2∶5
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【简答题】In the 20th century, advertising grew rapidly with new technologies such as direct mail, radio, television, the _______ and mobile devices.
【单选题】at first she refused to admit her fault but____apologizing
A.
ended up
B.
At last
C.
Turn out to
D.
Admit
【简答题】A.She made him apologize. B.She readily forgave him. C.She broke up with him. D.She refused to answer his calls.
【简答题】道叉的辙叉号码值得是()
【简答题】She applied to her____ (employ) for a pay rise, but she was refused.
【单选题】听力原文: The news media in the U. S. consists of radio, television, magazines, and newspapers which are pervasive in the lives of many Americans and influential in their daily routines. Many Americans be...
A.
The development of the news media in the U. S.
B.
The pros and cons of journalism.
C.
The development of Columbia Broad-casting System.
D.
The features of the news media in the U.S.
【单选题】If a television or radio breaks the new rules, it is forbidden to screen advertisements and the officials ______ face serious punishment.
A.
in place
B.
in order
C.
in advance
D.
in charge
【判断题】装配前,对零件必须进行平衡试验或密封性试验。
A.
正确
B.
错误
【简答题】Radio and television have ____, ____replaced the newspaper as carriers of new and opinion. (补充,而不是)
【简答题】At 17 he earned a sch______ to Cambridge to study maths in which he got a first-class degree three8.At 17 he earned a sch______ to Cambridge to study maths in which he got a first-class degree three y...
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