501、如果它们掉落,会出现永久性损坏。

A. 　用米尺来衡量金属盒的容识。

B. 　评测金属规则的维度,来作长远的分级。

C. 　用一个带有毫米刻度的金属尺来测量尺寸。

A. 　小心地取出配平盖板内的备份磁带。

B. 　小心地从胶带上拆除装饰盖。

C. 　小心地移除调整片,用其他的带子盖上。

A. 　 Soak the element for two hours.

B. 　 Wet the element for two hours.

C. 　 Stove the element for two hours.

A. 　 finish each chapter on a right hand page

B. 　 Start each section on a right hand page

C. 　 Start each section on a left hand page

A. 　 Drill the hole until it has a radius of 8.00+/-0.003 mm.

B. 　 Ream the hole until it has a diameter of 8.00+/- 0.003 mm.

C. 　 Trim the hole until it has a width of 8.00+/--0.003 mm.

A. 　排放管使通风系统的燃油返回油箱。

B. 　将从排气系统返回油箱的燃油排出。

C. 　排放通风系统里剩余燃油返回油箱。

A. 　松开卡箍,将螺钉固定到支架上

B. 　松开螺钉,将卡箍固定到支架上。

C. 　松开将卡箍固定到支架上的螺钉。

A. 　 The CAP will cover primary and secondary airframe components, and primary and secondary systems to
achieve the stated target of continued airworthiness.

B. 　 The CAP will remark primary and secondary airframe components, and primary and secondary systems to
complete the stated objection of continued airworthiness

C. 　 The CAP will locate primary and secondary airframe components, and primary and secondary systems to
accompany the stated objective of continued airworthiness

A. 　 Bleed the hydraulic system.

B. 　 Pressurize the hydraulic system

C. 　 Depressurize the hydraulic system

A. 　 Slowly and fully extend the RAT and make sure that it does not touch other parts.

B. 　 Quickly and fully retract the RAT and make sure that it does not touch other parts.

C. 　 Slowly and carefully extend the RAT and make sure that it does not attach to other parts.