把下列词语补充完整。
惊心____ 筋疲____
解方程:2x+3=1x.
Many people have got the habit of buying flowers for their mothers on _______.
大自然是多情的。南归的燕子带来春的柔情,翻滚的麦浪携_____来夏的炽烈,飒飒的清风送来秋的爽朗,纷飞的白雪飘来冬的欢畅。于是,草长_____莺飞间,鸟啼虫鸣间,山luán_____苍松间,我们用心聆听天lài_____。