A、 Mach digit is the percent of true airspeed to the speed of sound.
B、 Mach number is the ratio of true airspeed to the speed of sound.
C、 Mach number is the proportion of real airspeed to the speed of light.
答案：B
A、 Mach digit is the percent of true airspeed to the speed of sound.
B、 Mach number is the ratio of true airspeed to the speed of sound.
C、 Mach number is the proportion of real airspeed to the speed of light.
答案：B
A. Get approval for all modifications from the design authority.
B. The design department is irresponsible for approving the changes.
C. The arrangement has to be approved by the design department.
A. 护目镜的功能是避免灼伤眼睛。
B. 戴上护目镜以防止伤害眼睛。
C. 放在护目镜上以避免灼伤眼睛。
A. You can use the module to disassemble the disassembly fixture.
B. The module that you can use to disassemble is the disassembly fixture.
C. You can use the disassembly fixture to disassemble the module.
A. A Weight and Moment Limit diagram shall be used to describe the c.g.limits.
B. The maximum weight moment envelope diagram should be used to describe the c.g.limit of the aircraft.
C. A Weight and Moment Limit diagram shall be used to describe the maximum c.g.limit.
A. All essential or alternating equipment installed on a particular plane when provided shall be in the equipment list.
B. The equipment list shall include all necessary or alternative equipment installed on a particular aircraft when delayed.
C. The equipment list shall contain all required or optional equipment installed in the particular airplane when delivered.
A. The airflow goes along the top and bottom surfaces of the slats.
B. The airflow can go between the top and bottom of the slats.
C. The air flows to the top and bottom of the slats' surfaces.
A. 应该提供手册中使用的符号、缩略语和术语的定义或解释。
B. 应该定义并解释符号,并提供手册中术语和缩略语的使用方法。
C. 应该用手册来定义和解释符号,缩略语,术语的使用。
A. When the cumulative revised pages (including back-up pages) exceeds 60% of the total pages of the manual,a reissue should be prepared.
B. If the updated pages,including back-up pages,were less than 60% of the total page of the manual,a new manual should be copied.
C. Up to 60% of total pages (including back-up pages) were accumulated by mistake,the manual should be rewritten.
A. 前言中包括与 CAP 的程序关系,正常检查在产品说明中。
B. CAP 中要说明产品与正常检查之间的程序关系。
C. 前言中包含 CAP 与产品正常检验程序的关系。
A. 两次检查后最少等待两分钟。
B. 两次检查之间的最短时间是两分钟。
C. 两次检查之间最多等待两分钟。
