胎死不下的常见证型有（）

A.气滞血瘀

B.湿浊瘀阻

C.肾虚血瘀

D.气血虚弱

E.气虚血瘀

The nurse is caring for a toddler in respiratory arrest. The nurse will assist with endotracheal intubation and use an uncurled tube because the

A．vocal cords provide a natural seal.

B．trachea is shorter.

C．larynx is anterior and cephalad.

D．cricoid cartilage is the narrowest part of the larynx.