Install the valve and the correct gasket.

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 If you provide too much outdated information, your article will become difficult to read, which will force the reader to do it again.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. 使用耗材时要小心。

B. 小心使用易燃品。

C. 使用化学材料要小心。

A. 文本说明和有关例句构成了每个规则。

B. 每项规则都附有文字解释和相应事例。

C. 每条规则包括解释性的文本和相关的例子。

A. The Boeing-777 airplanes are different from the previous Boeing series ones mainly in that they are flown by wires.

B. The difference between the Boeing-777 airplanes and the subsequent Boeing series is that they are operated by wires.

C. Fly-by-wire is the main difference between Boeing-777 airplanes and the subsequent Boeing series.

A. The total weight must be approved and the CG shall be within the limits.

B. The total weight and CG must be within the specified range.

C. Totals must be within approved weight and CG limits.

A. Turbine press air is in the aft right body fairing.

B. The ram air turbine is located in the aft right body fairing.

C. The air pressed by turbine is located in aft right body fairing.

A. The engine and all additional facilities use indifferent lubricants.

B. The engine uses multiple types of lubricants for different purposes.

C. The engine and all auxiliary equipment use the same lubricant.

A. Make an estimate of the necessary quantity.

B. Evaluate on the quantity available.

C. Approximate the scale of the quality.

A. 在记录卡上做登记。

B. 在记录本上做账目。

C. 进入到记录本的登记中。

A. This Program usually includes two pages: one writing page and one drawing page.

B. This Program usually contains two pages: one test page and one image page.

C. This Program usually consists of two pages: one text page and one illustration page.