哪几阶段是绦虫的发育阶段()
A.钩毛蚴
B.囊尾蚴
C.囊蚴
D.裂头蚴
E.棘球蚴
参考答案:A, B, D, E
— I hear the famous singer Xu Song may come to Ningbo next month.
— Really? _______ he comes, my younger sister will be very excited.
A.If
B.Until
C.Unless
D.Before
下列哪一项表现是去大脑动物所没有的()。
A.脊髓休克
B.伸肌紧张亢进
C.迷路紧张反射
D.颈紧张反射
E.牵张反射