513.MAKE SURE THAT THE SPEEDBRAKE RETRACTS IMMEDIATELY.

A. 　Magnet valves shall be marked with distinctions,is to indicate the
valve spring-loaded into the open or closed position.

B. 　ElectroMagnetic valve shall be marked with a feature indicating whether
the valve is spring-loaded into the open or closed position.

C. 　Solenoid valves shall be shown with a mark,is to indicate the valve
spring-loaded to the open or closed position.

A. 　The values must not be more than the approved differences.

B. 　The values must not exceed the allowable differences.

C. 　The values must not exceed the approved error.

A. 　Distances shown are based on weak wind.

B. 　Distances shown are developed with no wind.

C. 　Distances shown are on the basis of gentle wind.

A. 　绝不在开车的时候接电话。

B. 　绝不在开车的时候问问题。

C. 　绝不在驾驶期间说话。

A. 　由于其他维护工作需要对设备进行维修。

B. 　由于对设备进行维修需要先完成其他维护工作。

C. 　由于完成其他维护工作而需要对设备进行的维修。

A. 　 文中此类插入语应简短明了并用于强调重要和关键的指示。

B. 　 文中此类插图应简单具体并用于强调重要和关键的指示。

C. 　 文中此类插入语必须简短明了并用于强调重要和批评性的指示。

A. 　转动凸轮以松开管路

B. 　转动卡以使管路自由移动

C. 　转动卡箍以松开管路

A. 　The intention of such terms is to provide definitions which have
practical value for technical communication.

B. 　The purpose of such terms is to provide definitions with practical value
for technical communication.

C. 　The aim of such terms is to provide definitions for practicing valuable
technical communication.

A. 　简介中应包含主题的字母索引,用于定位重要的电路。

B. 　字母表应按照主题分类后在简介中列出,用于定位理想电路。

C. 　简介中应包含主题分类的字母索引,以帮助查找所需的电路。

A. 　 PRODUCE

B. 　 GENERATE

C. 　 SUPPLY