On a vessel，multiplying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n)（）.

A.transverse moment

B.vertical moment

C.righting moment

D.inclining moment

扩张静脉和动脉，起效快，维持短的是

A．硝酸甘油
B．肼屈嗪
C．哌唑嗪
D．硝苯地平
E．硝普钠