以下关于OA公文流程工作规范，说法错误的是：

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.

The college students in China are _______ from smoking on campus because this will do them no good.

Professor Smith is also the _______ of the international program office. If you have any problem when you study here, you may go to him for help.