I wanted to catch ______early train, but couldn't get _____ ride to the station.[      ]

A. an, the

B. /, the

C. an, /

D. the, a

下列选项不是妊娠期正常 * * 变化（）.

A. * * 增大，充血明显

B. * * 增大变黑，易勃起

C. * * 较硬韧，可触及肿块，是乳汁淤滞所致

D.孕妇自觉 * * 发胀或偶有刺痛，浅静脉明显可见

E.乳晕变黑，外围有散在的结节状小隆起，称为蒙氏结节