以下哪项不是属于切线？（）
A.趋势线
B.通道线
C.分割线
D.角度线
参考答案：C
—Why is the famous althlete absent from the game?
—He has been________to take part in competitions for a year because of taking drags.
A．arrested
B．forbidden
C．declined
D．scolded
发现糖尿病患者出现急症，（）测试其血糖水平。
A.应该
B.不必
