①质变是量变的必然结果
②要不失时机地促成事物的质变
③勿以恶小而为之,要注重防微杜渐
④必须坚持适度原则
A:①②
B:①③
C:③④
D:②④
---Our teacher is always kind.
---Yes. When she asked me to answer her question yesterday, I gave a wrong answer at first. She _______me to try again.
一个人冬季乘火车外出旅行,当他到达目的地时,旅行袋内已装满了他一路上不得不脱下来的衣服,此人的旅行路线是( )