为了防止疾病因素引起的频繁遗精,应( )
①精力集中于学习上
②不穿过紧内裤
③睡前用温水洗脚
④早睡早起
⑤不看不健康的书籍.
A:①②
B:①②③
C:①②③④
D:①②③④⑤
They don't want the result so they hope to____ ____ ____now.