清洁表面，以确保粘接符合要求。

A. Mach digit is the percent of true airspeed to the speed of sound.

B. Mach number is the ratio of true airspeed to the speed of sound.

C. Mach number is the proportion of real airspeed to the speed of light.

A. You have the right to duplicate or publish this document or any substituent alteration or revision thereof, in whole or in part, free of charge.

B. You have the right to reproduce or publish this document or any subsequent modification or revision thereof, in whole or in part, free of charge.

C. You have the right to recopy or publish this document or any substantial alternation or revision thereof, in whole or in part, free of charge.

A. The connector has 32 contacting points.

B. The contact has 32 contactors.

C. The contactor has 32 contacts.

A. 可以理解的是，在某些情况下，遵守上述规定会导致重复测试程序，这是可以接受的。

B. 为了符合上述程序，有时会导致进行重复测试，这是可以接受的。

C. 可以理解为，符合上述要求就会导致接受重复测试程序。

A. Continue with the electronic adjust.

B. Complete with the electronic test.

C. Continue with the electrical test.

A. Correct punctuation is important because it shows that the different parts of the text are reconnected and prevents miscomprehension.

B. Correct punctuation is important because it shows how the different parts of the text are independent and prevents accumulation.

C. Correct punctuation is important because it shows how the different parts of the text are related and prevents ambiguity.

A. 单词在英语中通常有许多不同的意思。

B. 词组在英语中通常有许多难的意思。

C. 单词在英语中通常有许多难的含义。

A. Move it lightly and make it through the hole

B. Move it slightly to make it aim at the hole

C. Move it gently to make it enter the hole

A. 航线维修应理解为在飞行前进行的任何维修，以确保飞机适合预定的飞行。

B. 应理解航线维修是为飞行前对飞机实施的工作，目的是确保飞机安装了预定的装置。

C. 作为对飞行的保障航线维修工作应被理解。航前需要实施检查以确保完成安排的飞行。

A. If you find metal particles in the pump, find their source and repair the defective part.

B. If magnetic particles are found in the pump, locate their location and repair the affected part.

C. Locate their source and disassemble the defective part if you find metal objects.