A.莫尼茨絳蟲(chóng) B.華枝睪吸蟲(chóng) C.棘球絳蟲(chóng) D.無(wú)鉤絳蟲(chóng)
A.5-10 B.20-30 C.50-70 D.75~100
A.淡水螺 B.陸地螺 C.地螨 D.劍水蚤