伴随雷暴的风切变，其出现位置的最正确的说法是

空中走廊的宽度通常为_______公里，其中心线两侧各________公里。

A. 10、5

B. 8、4

巡航表速251 公里/小时以上的航空器,航线目视飞行最低安全高度的规定是

A. 距航线左右5 公里地带内最高点的真实高度不低于600 米；

B. 按航线目视飞行最低安全高度的规定执行；

C. 按航线仪表飞行最低安全高度的规定执行

从成都飞往北京，ETA1800UTC，当在北京进近时最可能遇到哪种降水情况TAF ZBAA 281400Z
281524 26015KT 9999 SHRA BKN020 TEMPO 1620 26020G30KT 8000 +SHRA BKN015CB TSRA

A. 大雨

B. 小雨和雾

C. 中雪

在北半球是什么原因使风向右偏转

A. 地表磨擦力的作用

B. 水平气压梯度力的作用

C. 地转偏向力的作用

雷达能探测目标主要靠：

A. 脉冲

B. 调制脉冲

C. 电波的反射

D. 多普勒效应

（案例分析）2017年9月3日，某机组驾驶飞机执行扎兰屯-海拉尔航班，在海拉尔最后进近阶段副驾驶接到管制指令的同时，机长下达指令“打铃，放轮，襟翼30”，副驾驶接到机长指令“打铃，放轮，襟翼30”后，由于疏忽，在场高1748ft选择45°襟翼，但未放下起落架手柄，机组发现起落架未放下后复飞。二次进近正常落地。请问机组可能存在哪些问题？(Case Analysis) On September 3, 2017, a certain crew flew the aircraft to carry out the Zhalantun-Hailar flight. At the same time as the copilot received the control instruction during the final approach phase of Hailar, the captain gave the instruction "Ring, gear down, and flaps 30”, after receiving the command from the captain “Ring, gear down, and flaps 30”, the copilot, due to negligence, selected the flaps 45° at 1748ft AGL, but the landing gear lever was not selected down. The flight crew found the abnormal situation of landing gear and excuted a missed approach. The second approach was made and ended with a normal landing. What possible problems may exist shown by the flight crew?

判断正误True or false: 当飞机在地面上时，TAT探头读数不能用于起飞前获取大气静温。When the airplane is on the ground, TAT probe readings must not be used to obtain the ambient static temperature before take-off

层积云和高积云的简写符号分别是

A. Sc、Ac

B. Sc、Ac

C. St、Ac

当得到进入现用跑道许可指令（跑道上滑行至起飞跑道头调头以前）时，完成起飞前程序。Upon obtained clearance to line up and wait active runway（taxiing on the runway, prior to takeoff runway turn），complete before takeoff procedures.

双发失效后，以下哪个系统不可用？Which of the following system is inoperative after dual engine failure.

A. 自动增压 auto-pressurization

B. 液压1b 2b 3a hydraulic1b 2b 3a

C. EDP 1/2

D. 偏航阻尼器2 yaw damper 2

E. 以上全部 above all