In many places in China, _____ bicycle is still _____ poplar means of transportation. [ ]

A. a; the

B. /; a

C. the; a

D. the; the

前置胎盘叙述不正确的是

A．胎方位清楚
B．先露入盆
C．胎心正常
D．子宫大小与停经月份一致
E．有时可在耻骨联合上方听到胎盘杂音