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【单选题】
下列反应起了氮的固定作用的是 ( )A.
N 2 与H 2 在 一定条件下反应生成NH 3
B.
NO与O 2 反应生成NO 2
C.
NH 3 经催化氧化生成NO
D.
由NH 3 制碳铵和硫铵
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【单选题】— How do you like the new watch? — ____. [ ]
A.
Yes , I like it
B.
Yes , I do
C.
No, I don't like it
D.
I like it
【单选题】计算机通信中，信道上的基带信号是指(45)，宽带信号是指(46)。
A.
信道上的直流信号直接传输
B.
信道上的交流信号直接传输
C.
信道上的模拟信号直接传输
D.
信道上的数字信号1或0直接表示两种不同的电压，然后送到线路上传输
【单选题】I'd like to______this old car for a new model but I'm afraid I can not afford it.
A.
exchange
B.
convert
C.
replace
D.
substitute
【单选题】I'd like to ______ this old car for a new model but I can't afford it.
A.
rescue
B.
exchange
C.
replace
D.
convert
【简答题】The title of Faulkner's novel The Sound and the Fury is quoted from a sentence in Shakespeare's play ---. A.Macbeth B.King Lear C.Hamlet
【单选题】I have never been to New York, but it s the place______.
A.
where I'd like to visit
B.
that I want to visit most
C.
that I want to visit it most
D.
in that I'd like to visit
【简答题】the title of the novel the sound and the fury comes from a play written by ___________.
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