A、 Write the instructions in the mandatory mode.
B、 Write the instructions in the imperative form.
C、 Write the instructions in the active mode.
答案：B
A、 Write the instructions in the mandatory mode.
B、 Write the instructions in the imperative form.
C、 Write the instructions in the active mode.
答案：B
A. 螺旋桨系统包括完整的机械或电气驱动螺旋桨、泵、马达、调速器、交流发电机,以及用于控制桨叶角的发动机外部或与发动机一体的组件和部件。
B. 螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机是用来控制桨叶角的发动机外部或整体的组件和部件。
C. 螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机和那些组件和部件,都位于发动机外部,或者与发动机是一个整体,用于控制桨叶角。
D. B.螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机是用来控制桨叶角的发动机外部或整体的组件和部件。
E. C.螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机和那些组件和部件,都位于发动机外部,或者与发动机是一个整体,用于控制桨叶角。
A. 座椅小桌板上覆盖了一层塑料,以盖住经过处理的小桌板部分。
B. 塑料罩被安装在座椅导轨上,以覆盖暴露的导轨部分。
C. 塑料罩被安装在座椅导轨上,以覆盖经过处理的导轨部分。
A. Use a filter to remove unwanted material from the oil.
B. Use a valve to remove unwanted material from the gas.
C. Use a filter to remove unwanted material from the fluid.
A. Put a plug on the open end of each pipe.
B. On the opening of each pipe,put a cover.
C. Put a cover on the loose end of the pipe.
A. 预估所需要的数量。
B. 估计必须的清洗液数量。
C. 估计所需要的消耗量。
A. Clamps should be spaced at intervals not exceeding 24 inches.Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.
B. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without pinching wires.
C. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without scratching wires.
A. The form of the climb performance presentation is decided by the airplane manufacturer.
B. The format of the cruise performance presentation is at the discretion of the airplane manufacturer.
C. The form of the cruise performance presentation is at the discretion of the airplane manufacturer.
A. The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B. The rotating nuts on both valves are meshed with the threads on the inner valve stud,so that the valve stud is loosened or tightened to a metal valve base.
C. The swing nuts on both valves engage with the threads on the internal spool,allowing the spool to loosen or tighten to the metal seat.
A. 描述飞机起落架时,应说明应急展开系统。
B. 描述飞机起落架时,应描述起落架应急放出系统。
C. 描述飞机起落架时,应说明应急逃生系统。
A. Completely retract the rod slowly and ensure not to touch other components.
B. Slowly protect the bar andguarantee not touching other parts.
C. Slowly extend the rod fully and make sure that it does not touch other parts.
