There must be a good airflow in the work area.

A. Set the width of the control rod as necessary.

B. Set the length of the control rod as necessary.

C. Set the height of the control rod as necessary.

A. The introduction should be included in an alphabetical index by subject.

B. An alphabetical index by subject is to be included in the introduction.

C. The introduction includes an alphabetical index subject.

A. In a descriptive text, give information gradually and make sure that each sentence contains only one topic. If you give too much information too quickly, your text will be difficult to understand and it will be necessary for the reader to read it again.

B. In a descriptive article, provide the information in steps and make sure that each statement covers only one point. If you provide too much outdated information, your article will become difficult to read, which will force the reader to do it again.

C. In a descriptive essay, present information in an orderly manner and ensure that each sentence contains only one meaning. If you give too much information, your essay will be difficult to understand and the reader will need to look through it again.

A. If the first coat is damaged, do a repair.

B. If the protective finish is damaged, do a repair.

C. If the primer layers are damaged, do a repair.

A. Loosen the cross nuts [10] on reducer [7] and standby valve [8] on each end of air pressure filter assembly [1].

B. Loosen the swivel nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].

C. Loosen the cotter nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].

A. 集气器/喷嘴环包含集气环、排气管道和加力燃烧室管道、可调喷嘴、作动筒、管路、连接装置、位置指示器、告警系统等。

B. 排气系统包含集气环、废气和推力增强管道、可调喷管、作动筒、管路、连动装置、位置指示器、告警系统等。

C. 集气器/喷嘴包含集气环、废气和推力增强管道、固定喷管、作动筒、管路、连动装置、位置指示器、告警系统等。

A. For normal operations, make sure the pressure relief valve is closed. An open pressure relief valve is a symptom of a problem in the fuel vent system.

B. For normal operations, make sure the shutoff relief valve works. If you open pressure relief valve, that indicates a problem in the fuel vent system.

C. For normal operations, make sure you close the pressure relief valve. If you leave it open, a problem will be shown in the fuel vent system.

A. 主要用于进入货舱的外舱门，包括结构件、门闩、把手、隔热材料、内衬、控制器等。

B. 主要用于进入货舱的内舱门，包括结构件、闩锁机构、扶手、绝缘材料、内衬、操纵装置等。

C. 主要用于进入货舱的外舱门，包括结构、闩锁机构、扶手、绝缘材料、内衬、控制装置等。

A. 在接下来的测试中，当穿越供油端口的燃油流量大于5毫升每分钟时，将得到破裂压力。

B. 在分项测试中，当穿越供油端口的燃油流量大于5毫升每分钟时，将得到开启压力。

C. 在接下来的测试中，当交输端口的燃油流量大于5毫升每分钟时，将得到开启压力。

A. 量规的精度必须符合适用的质量标准。

B. 选择量规必须参照已有的质量标准。

C. 采购护目镜必须满足相应的质量标准。