“疼痛剧烈，不能忍受，严重影响日常生活”属于疼痛
A．0级B．1级C．2级D．3级E．4级
参考答案：D
A big party was held in NO.18 Middle School last night, the teacher with students _____ singing and
dancing happily at the party. [ ]
A. is
B. was
C. are
D. were
人畜患血吸虫病后，从粪便里排出（）
A.血吸虫成虫
B.尾蚴
C.虫卵
D.毛蚴
E.囊虫
