以下不能传播传染性软疣的途径有（）
A.皮肤间直接接触
B.性接触
C.游泳池等公共设施
D.输血
参考答案：D
In his impressive manly voice, my father always _______the importance of setting proper goals in
different stages of life. [ ]
A. explains us
B. impresses on us
C. suggests to us
D. describes to us
瓦斯继电器装在（）与（）之间的联接管道中。
