成人子宫体与子宫颈的长度比例为()
A.2:1
B.3:1
C.1:2
D.1:3
E.1:1
参考答案:A
解析:成人子宫体与子宫颈的长度比例为2:1,婴儿期为1:2。
Americans who consider themselves ________ in the traditional sense do not usually hesitate to heap criticism in domestic matters over what they believe is oppressive or wasteful.
A.pedestrian
B.penchant
C.patriarch
D.patriotic
在燃油黏度控制系统中一般均采用()。
A.正作用式调节器,配合气开式调节阀
B.正作用式调节器,配合气关式调节阀
C.反作用式调节器,配合气开式调节阀
D.反作用式调节器,配合气关式调节阀