大量吸烟导致红细胞增多时，碳氧血红蛋白应大于（）
A.40％
B.5％
C.3％
D.6％
E.4％
参考答案：E
子宫动脉分布于（）
A．子宫
B．输卵管
C．卵巢
D．会阴
E．直肠
It was a type of urban story that continues to ______ big-city dwellers forward each day, a tale of hard work and self-starting initiative, of taking matters into one’s own hands to make dreams come true.
A. propel B. penetrate C. baffle D. harness
