There are ____________ countries in the U.K..
举一反三
- 中国大学MOOC: There are ____________ countries in the U.K..
- Exchange of [u] [/u] values makes the poor countries poorer. A: unequal B: uncover C: continue
- Exchange of [u] [/u] values makes the poor countries poorer. A: unequal B: uncover C: continue
- 夸克模型是（）。 A: u、d、k B: d、k、s C: k、s、u D: u、d、s
- f(k)=k(k—1)u(k—1)