257. When you replace a word, always make sure that the alternative you select does not change the meaning of the sentence

A. shock loading of an engine may arise from a repeat landing.

B. shock loading of the engine can occur during a light landing.

C. shock loading of the engine can occur during a heavy landing.

A. 确保秒表指示在2分钟或4分钟。

B. 确保秒表指示在2 至4分钟之间。

C. 确保指针指示在2 至4分钟之间。

A. Elevators’ movement controls the airplane to rotate about its laternal axis.

B. The lateral axis of the airplane is also called the pitch axis, and movement of the aileron rotates an airplane about its laternal axis.

C. The lateral axis of the airplane is also called the yaw axis, and movement of the elevators rotates an airplane about its axis.

A. When a warning, caution or note were in two or more paragraphs, the heading WARNING, CAUTION, NOTE, shall not be reminded above each paragraph.

B. When a warning, caution or note consists of two or more paragraphs, the heading WARNING, CAUTION, NOTE, shall not be repeated above each paragraph.

C. When a warning, caution or note were in two or more paragraphs, the foward word of WARNING, CAUTION, NOTE, shall not be repeated above each paragraph.

A. When a capital letter or a symbol is used for a unit of measurement, you should take it and the number before it as a word.

B. When used in measurement, the acronym or the symbol and the related number should be taken as a word.

C. When you write an abbreviation or a symbol for a unit of measurement, count it and the preceding number as one word.

A. Many electrical power components are in the EE compartment.

B. Many electrical power components are in the cargo compartment

C. Many electrical power components are in the APU compartment

A. That portion of the system which is used to dissipate static electricity.

B. That portion of the system which is used to discharge static electricity.

C. That portion of the system which is used to remove static electricity.

A. A mixture of water and methanol decrease the power of the engine. ***

B. A mixture of water and methanol augments the power of the engine. ***

C. A mixture of water and methanol decrease the power of the engine. ***

A. When stop the engine, make sure that the engine decelerates to 500 RPM.

B. If the engine decreases to 500 RPM, you must to stop it.

C. When the engine RPM decreases 500, you＇d better stop the engine.

A. Peel the insulation of the wire

B. Strip the insulation of the harness

C. Stripe the insulation of the harness