与胆囊癌相关性不大的是哪一项（）
A.陶瓷样胆囊
B.溃疡型结肠炎
C.慢性胆石症
D.胆囊炎
E.门静脉高压
参考答案：E
如图所示，某人骑摩托车在水平道路上行驶，要在A处越过x=5m的壕沟，沟面对面比A处低h=1.25m，（取g=10m/s2）
①摩托车在空中飞行的时间？
②摩托车的开始飞越壕沟的初速度至少要有多大？
—On 2014,April 16th,a South Korea ship carrying more than 450 passengers sank into the sea. Most of the pasaagers were students and lost their lives.
—______ sad news.
A．What a
B．How a
C．What
D．How
