2760.Adjectives are given in their basic form,with their comparative and superlative forms in parentheses.

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.

A. The housing for the voice recorder unit has these properties: water tolerance,shock resistant and heat resistant.

B. The container for the voice recorder unit has these properties: watertproof,spin resistant and heat resistant.

C. The container for the voice recorder unit has these properties: watertight,shock resistant and heat resistant.

A. 用净水清洗内表面。

B. 用温水清洗外表面。

C. 用冷水清洗外表面。

A. Utilizing an airplane as intended by the manufacturer and sound inspection and maintenance practices is basis that assures the airplane remains airworthy and safe to operate.

B. One of the basis for assuring the airplane remains airworthy and safe to operate is sound inspection and maintenance practices and forms.

C. Utilizing an airplane as intended by the manufacturer is the only basis for assuring the airplane remains airworthy and safe to operate.

A. Exhale into the oxygen mask.

B. Breathe into the oxygen mask.

C. Breathe into the gas mask.

A. 检查密封件是否有缺陷。

B. 检查封胶是否有缺损。

C. 检查封严是否有缺失。

A. 手册可能是活页形式,与持久的,多环封面,或显著黏附的。

B. 手册可以是活页形式,耐用,多环盖,或临时装订。

C. 手册可以是有耐用多环封面的活页形式,或永久装订。

A. 允许在下午 9 点到上午 6 点之间进入基地。

B. 允许在上午 9 点到下午 6 点之间审核基地。

C. 允许在上午 9 点到下午 6 点之间进入基地。

A. The glideslope path is at a constant angle to the threshold of the runway.

B. The glideslope path is at a variable angle to the first end of the runway.

C. The vertical course path is at a fixed angle to the threshold of the runway.

A. The Design Authority is responsible for approving and changing the repair procedure.

B. Any alteration to this repair procedure must get verbal approval of the Design Authority.

C. If you change this repair procedure,get approval of the Design Authority.