2003. 不要用普通螺母替代自锁螺母。

A. 数一下轮胎的胎面层数。

B. 计算轮胎的胎面数。

C. 检查轮胎的数量。

A. 试验结果表明,需要实施故障识别程序。

B. 如果测试没有给出满意的结果,执行故障隔离程序。

C. 如果测试结果不满足,启动故障探测程序。

A. 当涡轮的旋转能力被释放时,它在没有泵负载的情况下加速。当涡轮速度达到可操作位置,变桨凸轮将叶片的角度改变到中立范围。

B. 当涡轮被释放旋转时,它在没有泵负载的情况下加速。随着涡轮速度达到工作范围,变桨凸轮将叶片的角度改变到中间位置。

C. 当涡轮被释放旋转时,它在没有负载泵的情况下加速。当涡轮角度达到工作区间时,变桨凸轮将转子的速度改变到中间值。

A. Thus, the more words there are in a cluster, the more difficult it is to understand.

B. Therefore, the more words are there in a phrase, the more difficult it is to understand.

C. So, the more nouns in a phrase, the harder it is to understand.

A. Ground Control depicts minimum diameter of turning for taxiing and ground operation.

B. Ground Control describes minimum radius of turn for taxiing and ground handling.

C. The least radius of turn for taxiing and ground maneuver is described in Ground control.

A. The right fan provides more air, so it can not be replaced with the left one.

B. The left fan provides more air, so it can not be replaced with the right one.

C. The two fans can be changed each other.

A. 如果需要,制造商可以在维修手册中包含超过一种的飞机型号。

B. 如果需要,制造商可以在维修手册中包含最多一种的飞机型号。

C. 如果需要,制造商可以在维修手册中包含一种飞机型号。

A. Make sure that the position of the wing flaps is symmetrical.

B. Make sure that the wing flaps must move symmetrically at all time.

C. The wing flaps are moved to the symmetrical position.

A. Rigging: the adjustment of control and travel of movable flight controls , involves setting cable tension, adjusting travel limits of flight controls, and setting stops

B. Rigging: the adjustment of setting cable tension, adjusting travel of flight controls, and setting travel stops that involved the control and travel of movable flight controls

C. Rigging: the adjustment of control and travel of movable flight controls , involves setting cable tension, adjusting travel limits of flight controls, and setting travel stops

A. 左大翼二号油箱盖板断裂。

B. 左大翼二号油箱接近门变形。

C. 左大翼二号油箱入口门脱落。