无明显移位的外展型股骨颈骨折，多久可下地行走
A．6周B．8周C．3月D．6月E．8月
参考答案：C
As they _____ in the snowstorm in the deep mountains, they had great _____ in getting in touch with
the outside world. [ ]
A. lost; trouble
B.were caught; difficulty
C. were stuck; difficulties
D. were trapped; troubles
我国人口形势及预测
预测我国进入21世纪，人口增长率将可以控制在什么水平以内（）
A．8%
B．10%
C．12%
D．15%
