溃疡性结肠炎的X线表现为：
A．肠管边缘模糊，粘膜皱襞失去正常形态
B．结肠袋消失
C．肠管狭窄
D．肠管缩短
E．以上均是
参考答案：E
已知数列{an}是公差不为0的等差数列，{bn}是等比数列，其中a1=3，b1=1，a2=b2，3a5=b3，若存在常数u，v对任意正整数n都有an=3logubn+v，则u+v=______．
Kate looked so sad at the news that she failed in the exam that I didn't know what to say to ________
her. [ ]
A. treat
B. interest
C. comfort
D. annoy
