题干
— _____ around the world is to learn about the world.
— Yes, it's a good way ____ the world.
A：To travel; to know
B：To travel; know
C：Travel; to know
D：Travel; know
答案(点此获取答案解析）
A
4NO（g）+ 6H2O（
g），下列叙述正确的是
