溃疡性结肠炎最常见的临床表现为（）
A.明显的上腹痛
B.腹泻
C.发热
D.腹水
E.腹胀
参考答案：B
各级政府预算经本级人大批准后，应当直接向相应的国家机关备案。（）
- ______ times has Liu Xiang been in the world competition?
-I have no idea. Let’s find it out on the Internet.[ ]
A. How soon
B. How long
C. How many
D. How much
