The best way _______ there is by bike. It's healthy for us.
A:to go
B:go
C:go to
D:to go to
如果把自然界水里溶解的气体收集起来,分析的结果是氧气的体积分数大于21%,而氮气的体积分数小于78%,此现象说明____。
What city is it?____