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
.Do you know ______ to deal with the problem? Could you tell me?
A.what
B.how
C.which
D.why
一般林区地籍图比例尺不小于()。
A.1:5000
B.1:1万
C.1:2万
D.1:5万