A、 Mach digit is the percent of true airspeed to the speed of sound
B、 Mach number is the proportion of real airspeed to the speed of light
C、 Mach number is the ratio of true airspeed to the speed of sound.
答案：C
A、 Mach digit is the percent of true airspeed to the speed of sound
B、 Mach number is the proportion of real airspeed to the speed of light
C、 Mach number is the ratio of true airspeed to the speed of sound.
答案：C
A. The section of the engine in which the air and fuel are combined and burned. Includes items such as burner cans, cases, etc.
B. The section of the engine in which the air and fuel are combined and burned in burner cans and cases.
C. The air and fuel are combined and burned in the engine, Includes items such as burner cans, cases, etc.
A. 所有文本应在一栏或两栏内编写,并由制造商自行决定是否合理;但是,为了便于阅读,最好使用两栏
B. 制造商应分别在一列和两列中准备所有文本,但两列更便于阅读。
C. 根据制造商的解释,所有文本应在一列或两列中准备,但两列具有更好的视觉效果。
A. 当ATC发射机或DME询问器发送信号时,TCAS计算机会收到一个抑制脉冲。
B. 当ATC应答机或DME编码器发送信号时,TCAS计算机会收到一个抑制脉冲。
C. 当ATC应答机或DME询问器发送信号时,TCAS计算机会收到一个抑制脉冲。
A. 操作部件两个循环,从管道排除空气拆下组件
B. 操作部件两个循环,排除管道中的空气
C. 操作部件使空气两次循环,从管子上拆下
A. 作为指示气源系统的温度和压力的部分。主要是温度和压力警告系统。
B. 用于指示气源系统的温度和压力的部分。包括温度和压力警告系统。
C. 用于指示气源系统的温度和压力的部件。包括温度和压力传感器。
A. 给坦克更换新的燃油。
B. 用新的滑油灌洗油箱。
C. 给油箱注入新的滑油。
A. 燃油泵安装在隔板上部。
B. 燃油泵安装在隔板附近。
C. 燃油泵安装在隔板下部。
A. the air pressure is almost correct
B. the air pressure is too low
C. the air pressure is too high
A. 不要将压缩空气出口对着你的皮肤
B. 不要使压缩空气吹到皮肤
C. 不要将压缩空气对准蒙皮
A. Copy density should be the same throught the page.
B. Copy density must be different throught the page.
C. Density of copy shall be consistent throught the page.
