喷气式发动机的基本原理很简单，其结构也非常简单。

Not only the basic principle of the reciprocating engine is simple, and also the assembly.

The basic principle of a jet engine is simple, and so is its construction.

The basic principle of the propeller driven engine is simple, as well as the installation.

正确答案：B

Start a safety instruction with a clear and simple command or condition.

It operates when the pressure applied in the opposite direction is more than a set value.

"Emergency Procedures" shall have a red plasticized tab divider.

When a new paragraph starts, the reader knows that there will be new or different information in that paragraph.

Emergency Shutdown does not include the units themselves.

One thirty-second is an example of fractions.

When this occurs, 9th stage bleed air is automatically used.

Auxiliary fuel tanks are normally removable tanks.

Outlet pressure of control unit fails to stabilize at proper pressure.

Make sure the area for test is free of any people.