During his first trip to China, President Obama discussed some key global issues such as economic recovery, climate change, _______ nuclear weapons in his talks with Chinese President Hu Jintao.

根据题意回答问题：

函数$f\left(x\right)=\ln x-\frac{2}{x}$的零点所在的大致区间是 （   ）

下面句子没有语病的一项是（    ）

世界上使用人数最多和使用范围最广的语言分别是（    ）