1869.Adjust the potentiometer until you do not hear a hum from the loudspeaker.

A. Provide the pneumatic power for the system.

B. Supply the electrical power for the system.

C. Remove the electrical power of the system.

A. 当替换某个单词时,一定要确保所选择的替代词不会改变句子的意思。

B. 如果需要替换某个单词,从备用词汇中选择合适的词以确保不会改变句子含义。

C. 当替换某个单词时,始终要确保不要变动句子的意思和结构。

A. The lower seal is invisible prior to switching the lower bearing on.

B. The lower seal becomes visible when you push the lower bearing up.

C. The lower seal comes into view when you pull the lower bearing down.

A. 给轮胎放气。

B. 给轮胎充气。

C. 给机轮充气。

A. 当使用引号的技术名称以使读者读起来更清晰时,带引号的一组单词也是适用的名词词组中的一个词。

B. 当使用连字符连接长的技术名称从而使读者读起来更清楚时,连接在一起的一组单词在相应名词词组中也算作一个词。

C. 当用冒号连接长的技术名称以使读者读起来更清楚时,冒号连接的一组单词也可以用作适用的名词词组中的一个词。

D. C.当用冒号连接长的技术名称以使读者读起来更清楚时,冒号连接的一组单词也可以用作适用的名词词组中的一个词。

A. If the aircraft is parked on the ground,make sure that wheel chocks are placed.

B. If the aircraft is parked on the ground,make sure that wheel chocks are in position.

C. If the aircraft is parked on a slope,make sure that wheel chocks are in position.

A. Make sure that the latch is fully engaged.

B. Make sure that the knob is fully engaged.

C. Make sure that the latch in full engaged position.

A. 在紧急情况下,飞行员应准备至关重要的物品的检查清单。

B. 在关键情况下,飞行员的检查清单应限制在最大量,而且是对飞行员至关重要的。

C. 检查清单应限于在紧急情况下对飞行员至关重要的物品的最小数量。

A. 本部分用于相同的安排方法和识别特定主题材料。

B. 本部分规定了安排和识别某些主题材料的同类方法。

C. 本部分提供了安排和识别特定主题素材的统一方法。

A. Misunderstanding will occur if a word is only understood by a large amount of people in a special technical area.

B. If a word is only known by quite a small amount of people in a special technical field,there will be communication interference.

C. If a word is only understood by a very small number of people in a specific technical area,it will cause interference in communication.