A、 螺旋桨的拉力与它的常规方向相反，造成了制动效果。
B、 螺旋桨的旋转朝向相反方向，导致完全停车。
C、 螺旋桨的推力指向与飞行方向相反，产生制动作用。
答案：A
A、 螺旋桨的拉力与它的常规方向相反，造成了制动效果。
B、 螺旋桨的旋转朝向相反方向，导致完全停车。
C、 螺旋桨的推力指向与飞行方向相反，产生制动作用。
答案：A
A. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated dim blue. The wing anti-ice valve is not in the ordered position.
B. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated bright blue. The wing anti-ice valve is not in the commanded position.
C. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated dim blue. The wing anti-ice valve is not in the preferred position.
A. 安全说明告诉读者，程序或程序中的步骤可能存在危险或造成损伤。
B. 安全说明告诉读者，程序中的程序或步骤可能是危险的或造成损伤。
C. 安全说明告诉读者哪些程序或步骤是危险的，或是可以造成损伤的。
A. 空中模式设定30秒后飞行开始。
B. 飞行开始30秒后可以进入空中模式。
C. 当探测到空中模式超过30秒, 飞行开始。
A. Count the velocity in the circuit.
B. Compute the current in the route.
C. Calculate the voltage in the circuit.
A. The tops of the bolt heads must not be more than 5 MM above the plate.
B. The bottoms of the bolt heads can be more than 5 MM above the plate.
C. 5 MM is permitted for the tops of the bolt heads below the plate.
A. Dust can contaminate all areas.
B. Dirts are contamination of all filters.
C. Dust can cause contamination on all filters.
A. An inoperative pump will be identified by a decontaminated filter.
B. Contaminated filter elements indicate a defective pump.
C. If filter elements are clean , the filter elements are inoperative.
A. Cut the shim to the correct size.
B. Trim the washer to the correct size.
C. Cut the patch to the correct dimension.
A. Write the instructions in the mandatory mode.
B. Write the instructions in the imperative form.
C. Write the instructions in the active mode.
A. You can use all standard English parentheses except the colon.
B. You can use all standard English contraction marks except the hyphen.
C. You can use all standard English punctuation marks except the semicolon.
