垂体微腺瘤是指肿瘤直径（）
A.<2cm
B.<1cm
C.>3cm
D.>4cm
E.无确定标准
参考答案：B
If it ______, they'll have a sports meeting in their school.
A. isn't rain B. doesn't rain C. didn't rain D. won't rain
绞窄疝是指
A．疝内容物与疝囊壁发生粘连
B．疝内容物不能还纳腹腔
C．疝内容物发生血运障碍
D．疝内容物不易还纳腹腔
E．疝环狭小
