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【简答题】
用配方法解方程x 2 -2x-1=0时,配方后得到的方程为 A. B. C. D.
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皮皮学刷刷变学霸
举一反三
【单选题】排气再循环系统主要目的是净化排气中的()
A.
CO
B.
NO X
C.
HC
D.
微粒
【单选题】Brunel became an apprentice with his father when he was very young
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】apprentice:
【单选题】You are being thoroughly in refusing to allow your son to be an apprentice to the stonemason.
A.
unpredictable
B.
unthinkable
C.
unreasonable
D.
undesirable
【判断题】三元催化器是安装在汽车排气系统中最重要的机外净化装置
A.
正确
B.
错误
【判断题】三元催化器是安装在汽车排气系统中最重要的机内净化装置。
A.
正确
B.
错误
【简答题】apprentice
【简答题】A) apprentice B) market C) sale D) business
【单选题】Nobody knows what the ______ of the war will be.
A.
development
B.
outcome
C.
expectation
D.
possibility
【单选题】Nobody knows who will be the( )of this city.
A.
mayor
B.
inhabitant
C.
dash
D.
bow