溃疡性结肠炎发生中毒性巨结肠，一般以下列哪一部位最严重
A．直肠B．横结肠C．降结肠D．升结肠E．乙状结肠
参考答案：B
You can't imagine when the pupils received these nice presents on Children's Day. [ ]
A. how they were excited
B. how excited they were
C. how excited were they
D. they were how excited
最有税理论的核心是（）和（）.
