1605. Align the drill until it is perpendicular to the surface

A. Do not make the pressure became less than (or more than)20 psi.

B. Do not let the pressure become less than (or more than)20 psi.

C. Do not let the pressure close less than (or more than) 20 psi.

A. Another important function of lubricating oil is to protect the corroded metal surfaces.

B. Another important task of the oil is to protect the metal surfaces from corrosion.

C. Preventing the metal surface from further corrosion is the other essential function of the lube.

A. Be sure that magnet plate system 1 and magnet plate system 2 are identical.

B. Make sure that compass system land compass system 2 are synchronized.

C. Ensure that magnet plate system 1 and magnet plate system 2 are simultaneous.

A. Main frame: including compartment, bulkhead, firewall, beam, keel, exterior opening of compartment, etc.

B. Main Frame: Includes items such as frames, bulkheads , firewalls, stringers, keel, frames around openings, etc.

C. Main frame: including compartment, bulkhead, firewall, beam, keel, opening inside compartment, etc.

A. 燃油通过雾化器进入燃烧室,在那里进行点火;

B. 燃油通过增压器进入燃烧室,在那里进行点火;

C. 燃油通过雾化器进入压缩机,在那里进行点火;

A. 所有三个螺栓孔必须与燃油管匹配。

B. 所有三个支架孔必须与燃油管对齐。

C. 所有三个支架孔必须与然油管齐平。

A. Two systems can be energized at a time.

B. Two systems can be engaged at the same time.

C. Two systems can be adopted separately.

A. Do not taxi where there is dirt.

B. Do not tow in areas where there is slush.

C. Do not land in locations where there is slush

A. 空中模式设定30秒后飞行开始。

B. 飞行开始30秒后可以进入空中模式。

C. 当探测到空中模式超过30秒,飞行开始。

A. The fuselage is a semi-monocoque structure

B. The fuselage is a demi-plate.

C. The airframe is of half-shell structure.