点击收听音频讲解：
Day 42A positive attitude will have positive results,because attitudes are contagious.
积极的态度会带来积极的结果，因为态度是具有感染力的。
Key words:positive adj. 积极的；→ positive energy 正能量；确凿的；→positive evidence
attitude n. 态度；have a/an + adj+ attitude+toward(s); He has a positive attitude towards life.
altitude n. 高度；The altitude of the mountain is 1000 meters.
contagious adj. 有感染力的；Laughing is contagious. 笑是有感染力的。mountain→mountainous→This is a mountainous area.
