A.黃色B.紅色C.綠色D.黑色
A.血居吸蟲(chóng)B.雙穴吸蟲(chóng)C.莖雙穴吸蟲(chóng)D.側(cè)殖吸蟲(chóng)
A.漂游魚(yú)波豆蟲(chóng)B.碘泡蟲(chóng)C.青魚(yú)艾美蟲(chóng)D.斜管蟲(chóng)