比较某市各区、县肝炎患病率的情况，宜绘制（）.
A.线图
B.百分条图或圆图
C.直方图
D.直条图
E.半对数线图
参考答案：D
— I'm afraid I have to give it up．
— Don't be discouraged. Remember _____ sticks to his work will succeed one day．[ ]
A. anyone
B. who
C. no matter who
D. whoever
下颌联冠式斜面导板，其斜面应与上切牙长轴呈多大角度
A．30°
B．50°
C．70°
D．60°
E．45°
