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【单选题】
下列航空发动机的性能中,影响飞机复飞性能的主要是:A.
发动机的可靠性
B.
发动机的高空性
C.
发动机的加速性
D.
发动机的维护性
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反馈参考答案：
举一反三
【单选题】What does the woman say about stamp collection?
A.
She started collecting stamps from her childhood.
B.
A good stamp collection can be built in a short time.
C.
A rare set of stamps is worth a lot of money.
D.
It is nearly impossible to collect a rare set of stamps.
【简答题】This concept was c____ 造字 by Charles Horton Cooley.
【单选题】As we have expected, this new concept was quickly by post-80s and post-90s.
A.
received
B.
accepted
C.
obtained
D.
acquired
【判断题】控制系统中如果某处或数处信号是脉冲序列或数码，则这样的系统称为离散时间系统，简称离散系统。计算机控制系统是离散控制系统的一种，系统控制器由计算机来实现。
A.
正确
B.
错误
【简答题】属于,适合放在(某处) v —————— .
【单选题】What does the man ask the woman to do?
A.
Leave details at the front desk.
B.
Wait while he checks a record.
C.
Fill out some forms.
D.
Verify an amount.
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