病人腹痛窘迫，时时欲便，肛门重坠，大便出不爽，称为（）
A.便秘
B.泄泻
C.里急后重
D.肛门气坠
E.大便失禁
参考答案：C
She could speak both English and French, but _________ is hard to believe.
A．she
B．this
C．that
D．which
过热器的作用是什么？
