(案例分析)某日某机组接收管制员指令在某点等待，管制员并未告知机组左或右等待，飞机此时正好正切这一点左等待2转弯改出位置，机组随即加入左等待飞三边航迹，请问机组加入等待程序是否正确？简述原因（cases analysis）On a certain day, a crew received a command from the controller to hold over a certain point, and the controller did not inform the crew that it was a left or right holding. At this moment, the aircraft was just tangent to the Exit position of the 2nd turn of the left holding over this point. And the crew then immediately joined the left holding to fly the downwind track. Was the way correct that the crew joined the holding procedure? Brief the reasons.

A. 蓝色

B. 白色

C. 红色

A. 10

B. 20

C. 30

A. 左引气管道

B. 引气错误构型

C. 右防冰管道

D. 右发引气

A. 惯性离心力

B. 地转偏向力

C. 摩擦力

A. 绿色 Green

B. 白色 White

C. 红色 Red

D. 黄色 Yellow

A. 按照CCAR61 部颁发的私用驾驶员执（含以上等级的驾驶员执照

B. 按照CCAR61 部颁发的商用驾驶员执照

C. 按照CCAR61 部颁发的商用驾驶员执照和仪表等级

A. 当N2超过105%时 when the N2 exceeds 105%.

B. 当N2超过107%时 when the N2 exceeds 107%.

C. 当N2超过109%时 when the N2 exceeds 109%.

D. 当N2超过110%时 when the N2 exceeds 110%.

A. VR-10kn

B. VR

C. VR-5kn

A. 现用模式指示绿色，预位模式指示白色Active modes are indicated in green, armed modes are indicated in white

B. 现用和预位模式指示白色 Active and armed modes are indicated in white

C. 现用模式持续闪烁，预位模式指示白色。Active modes flash continuously, armed modes are indicated in white

D. 现用模式是蓝色，预位模式是白色。Active modes are in blue, armed modes are in white

A. 能形成结构不同的云

B. 在地面天气图上风的方向斜穿等压线C覆盖大片地区

C. 温度和湿度等特性相对均匀