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【单选题】
下列各组离子中,能大量共存于同一溶液中的是( )
A.
CO32-、H+、Na+、N03-
B.
NO3-、SO42-、K+、Na+
C.
H+、Ag+、SO42-、Cl-
D.
Na+、NH4+、Cl-、OH-
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参考答案:
举一反三
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【判断题】当代传播媒介日新月异的发展,不仅推动了人类文化的发展,也为文化传播提供更为多元化的渠道。
A.
正确
B.
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【单选题】Boys and girls, you should know what a great difference good manners in public will ________ to a person.
A.
owe
B.
belong
C.
contribute
D.
make
【单选题】According to this passage,
A.
crowdfunding means outsourcing to the public jobs typically performed by employees.
B.
more and more people begin to use crowdfunding as a great help to their careers.
C.
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D.
Cameesa. com helps to connect music lovers with unsigned artists looking to record albums.
【单选题】—Are your printers easy to use? You see,we’ve managed without one up to now. Why are there so many knobs and buttons? — ( ) In fact, they’re entirely automatic.
A.
Whatever you think it is.
B.
Sorry to disappoint you.
C.
They couldn’t be easier.
D.
It’s the cheapest one.
【单选题】AIDS is causing great public concern because the_____fatal disease hits primarily young people.
A.
invariably
B.
imperatively
C.
transiently
D.
deceptively
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