1126. Loosen the elbow fitting(18) at the filler adaptor(17)

A. A lab analysis of the contamination is required to the frequently clogged filters.

B. When you find the filters blocked in a very short time, ask the vendor to inspect them for any contamination.

C. If the filters get clogged at an unusually early stage, send them to the laboratory to analyze the contamination.

A. 句子末尾的主要部分添加一个引号。

B. 在句子主体的末尾部分添加一个冒号。

C. 在主要句子的末尾处添加一个句号。

A. 可以在强风天气下打开货舱门,强风对于打开的货舱门是非常危险的。

B. 不要在强风天气下打开货舱门,强风对于打开的货舱门是不安全的。

C. 不要在强风天气下打开货舱门,强风对于打开的货舱门是非常危险的。

A. apply a coat

B. apply a primer

C. apply a bottom primer

A. A part of a system for the preservation and delivery of fresh drinking water. If potable water is also used for flushing, a flushing system is installed.

B. That portion of the system which is used to store and deliver fresh drinking water. Includes wash water system if the potable water is also used for washing.

C. The part of a system used to store and convey potable water in a tank. If potable water is also used for flushing, a flushing system is included.

A. The isolation valves are interchangeable with the APU shutoff valve, so the valves should have the same serial number.

B. The isolation valves and the APU shutoff valve are identical.

C. The isolation valves are identical with each other and with the APU shutoff valve, but you can not change them each other.

A. The engine-driven pump is the major pump that works endless when it is switched on.

B. The engine-driven pumps are the main pumps that runs continuously during operation.

C. The engine-driven pumps are the secondary pumps that operates infinitely after running.

A. Where schematic diagrams are complex by virtue of automatic features or articulated controls in the subject system, these characteristics should be pointed by means of explanatory text in the diagram, or in the accompanying text,or both.

B. Where schematic diagrams are complex by venture of automatic characters or articulated controls in the subject system, these characteristics should be pointed at by means of apparent text in the diagram, or in the accompanying text,or both.

C. Where schematic diagrams are complex by virtue of automatic features or interrelated controls in the subject system, these characteristics should be pointed out by means of explanatory text in the diagram, or in the accompanying text,or both.

A. Clean window using much quantities of soap and water.

B. Clean window using liberal quantities of soap and water.

C. Clean window with large quantities of soap and water.

A. If problems are found, refer to maintenance manual.

B. If you find a problem, refer to the troubleshooting manual.

C. If you find a problem, troubleshoot the manual as reference.