多发生于全结肠（）
A．克罗恩病
B．肠结核
C．溃疡性结肠炎
D．小肠憩室
E．平滑肌瘤
参考答案：C
We’d say that never before so moving a film as After Shock.
A．we had seen
B．had we seen
C．we have seen
D．have we seen
锅炉燃烧器中二次风风量应占总风量的（）。
A．10%～30%
B．50%左右
C．60%～70%
D．70%～90%
so moving a film as After Shock.