【单选题】用来确保输出轴和变速齿轮锁在一起同速转动的部件称为( )
【单选题】用来确保输出轴和变速齿轮锁在一起同速转动的部件称为
【单选题】用来确保输出轴和变速齿轮锁在一起同速转动的部件称
【单选题】How should one examine the trachea?
A.
Place fingers on both sides of the trachea.
B.
Place fingers on one side of the trachea.
C.
Place fingers on sternocleidomastoid.
D.
Place hands on each side of the trachea.
【多选题】在投掷三枚骰子的试验中,某次试验得到的三颗骰子点数分别为1,2,5,下列哪个事件没有发生( )
【单选题】The following statements concerning the trachea are true except
A.
It lies anterior to the esophagus in the superior mediastinum.
B.
In deep inspiration the carina may descend as far as the level of the sixth thoracic vertebra.
C.
The left principal bronchus is wider than the right principal bronchus.
D.
The arch of the aorta lies on its anterior and left sides in the superior mediastinum.
E.
The sensory innervation of the mucous membrane lining the trachea is derived from branches of the vagi, and the recurrent laryngeal nerves.