锁肛痔的早期症状是
A．便血、排便习惯改变B．流脓、瘙痒、疼痛C．黏液血便、里急后重D．肛门疼痛、习惯性便秘E．腹泻与便秘交替
参考答案：A
21st Century Teens ________ 8 sections, of which I like Fun Time best.
A．consists
B．made up of
C．including
D．consists of
简述施用微量元素肥料的注意事项。
