起落架放下锁定时402VU如何显示？

VBV，VSV给MEC的反馈是由什么形式的反馈（ ）

动力装置的反推力是改变什么来实现的（ ）

发动机操纵系统主要包括哪三个子操纵系统（ ）

发动机的起动活门可以通过哪些方式控制打开和关闭（ ）

从外面开门前发现观察窗上横挂一红色警告带

As a commander, you should not _______ the soldiers to unnecessary danger.

This newspaper often _______ the government’s opinion, not the public opinion.

Although in great danger, the wounded still did not want to _______ from the front.

This movie has a _______ ending. You can not imagine who will be killed finally.

During the graduation _______, the president gave a wonderful opening speech.