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【判断题】
钢的含碳量越高,选择淬火加热温度越高。A.
正确
B.
错误
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【单选题】已知实信号f(t)的傅里叶变换为F(jω)=R(ω)+jX(ω)，则信号y(t)=0.5[f(t)+f(-t)]的傅里叶变换Y(jω)等于（）。
A.
R ( ω )
B.
2R ( ω )
C.
R ( 2 ω )
D.
R (0.5 ω )
【简答题】幻想曲（Fantasia）
【单选题】程序段G98 F15.5表示( )。
A.
进给速度为15.5mm/min
B.
主轴线速度为15.5m/min
C.
进给速度为15.5mm/r
D.
主轴线速度为15.5mm/s
【单选题】A: Fantasia. This is Coast Station. Advise you alter 90 degrees to starboard to avoid fishing boats. Over.B: Coast Station. This is Fantasia. OK. I’ll do that. Over.Q: What will Fantasia do?
A.
Fantasia will alter 09 degrees to port.
B.
Fantasia will alter 09 degrees to starboard.
C.
Fantasia will alter 90 degrees to port.
D.
Fantasia will alter 90 degrees to starboard.
【单选题】已知实信号f(t)的傅里叶变换F(j)=R(w)+jX(w),则信号 的傅里叶变换Y(jw)等于( )。
A.
R(w)
B.
2R(w)
C.
2R(2 w)
D.
R(0.5 w)
【简答题】The Center for a New American Dream pointed out that brand loyalties could be formed as early as age two.
【单选题】Task 2 Directions : The following is a poster. After reading it, you will find 3 questions or unfinished statements, numbered 45 to 47. For each question or statement, there are 4 choices marked A, B,...
A.
the application for Club membership
B.
the postponement of President's Cup
C.
the final result of President's Cup
D.
the activities of Club President
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