If one or more blades are missing, make an entry in the engine logbook.

A. 描述飞机起落架时，应描述减震系统。

B. 描述飞机起落架时，应描述放重装系统。

C. 描述飞机起落架时，应描述冲击避免系统。

A. The main gear leg could be held by the side stay.

B. The main gear leg could be hampered by the side stay.

C. The main gear leg could be contained by the side stay.

A. If the error is more than 3 degrees, calibrate the glide slope.

B. If the error is more than 3 degrees, calibrate the compass.

C. If the error is more than 3 degrees, calibrate the gyroscope.

A. Do the weighing procedure in this sequence.

B. In this order to perform the swapping procedure.

C. In this sequence to do the analysis procedure.

A. The numbering of paragraphs and subparagraphs within a section is not required.

B. No numbers of paragraphs and subparagraphs is required in a section.

C. The numeral order of the paragraphs and subparagraphs is unnecessary in a section.

A. 在移动控制杆（器）前，检查锁定状态。

B. 请在完成解锁前移动控制杆（器）。

C. 移动控制杆（器）之前先解锁。

A. 燃油排放系统保持油箱压力接近环境压力。太大的压力会引起机翼结构损坏。

B. 燃油通风系统保持油箱压力接近大气压力。压差过大会引起机翼结构损坏。

C. 燃油通风系统确保油箱压力在接近大气压时保持稳定。太大的压力变化会引起机翼结构损坏。

A. The dictionary includes some unapproved words that can be technical names if you can put them in the applicable technical name category.

B. Some unapproved words in this dictionary can be seen as technical words if they have been classified into the technical name category.

C. The dictionary shall include the unapproved words that can be put in the appropriate technical name category and count as technical name.

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. 描述飞机起落架时，应描述其相应的结构（构件）。

B. 描述飞机起落架时，应描述其建设。

C. 描述飞机起落架时，应描述施工方法。