Operate the dimmer switch and make sure that the intensity of the light changes.

A. The release of high temperature wing anti-ice air will cause injury to persons.

B. The opening of high pressure wing anti-ice air will cause injury to persons.

C. Injury to persons can be caused by releasing the hot anti-ice liquid.

A. The damper prevents abnormal movement of the control.

B. The control is protected from unusual movements by the damper.

C. The damper prevents sudden movement of the control.

A. 慢慢地拧动活门。

B. 慢慢地转动叶片。

C. 慢慢地松开电门。

A. 本节必须规定型号合格证所要求的每一次强制更换时间，结构检查间隔，以及相关的结构检查程序。

B. 本节必须规定每一次强制更换时间，结构检查间隔，和机型证书所要求的相关的结构检查程序。

C. 本节必须规定部件更换的时间，结构检查时间，和相关的结构检查程序所需的型号合格证。

A. The audio input with highest priority will be decreased by amplifier.

B. The audio input will be increased by amplifier firstly.

C. The audio input that has the highest priority will be enlarged by amplifier.

A. 符合规范的问题应提交给通用航空制造商协会(GAMA)和联邦航空管理局(FAA)解决。

B. 问题应符合规范，查阅通用航空制造商协会(GAMA)和联邦航空管理局(FAA)得到解决。

C. 遵守规范的问题应涉及到通用航空制造商协会(GAMA)，并提交给联邦航空管理局(FAA)解决。

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. Use the tube if it＇s worked into 3.3 feet long.

B. Use a tube whose length is 3.3 feet.

C. The tube which is used is 3.3 feet length.

A. 为减慢固化过程，减少对化合物的加热。

B. 为减缓损耗，降低复合材料承受的热量。

C. 减少施加的热量会导致制作工序减慢。

A. Make sure that the bolt heads are attached to the skin.

B. Make sure that the screw heads are connected with the metal.

C. Make sure that the fastener heads are flush with the skin.