子宫最狭窄的部分是

A．组织学内口
B．解剖学内口
C．子宫外口
D．子宫峡部
E．子宫颈管

In heavy seas the helmsman should steer the survival craft（）.

A.into the seas

B.broadside to the seas

C.in the same direction as the seas

D.in a series of figure-eights