下列哪种媒介的雄虫不传播疾病（）.
A.蚊
B.蝇
C.蚤
D.虱
E.蜚蠊
参考答案：A
When I got there, I walked along a winding path, listening to birds sing, watching children ________ toy
sailboats in a huge fountain. [ ]
A. trick
B. wipe
C. float
D. slim
多序列比对（multiple sequence alignment）
