已知a＞b＞0，则 $\frac{a}{b}$ 与 $\frac{a+1}{b+1}$ 的大小是____．

下列关于生物进化总趋势的叙述中，错误的是（　　）

．Although it         in the desert most of the year, people still live there．

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。
Dear Peter,
       I'm glad to receive your letter. Thank you for your caring for the weather and my health. Now I'd like to tell you something a____ the smog（雾霾）.
Since the winter last year, the smog has t____ place for several times. It has done great harm to our d____  life. Many traffic accidents happened just because of the heavy smog weather. More and more people have to go to see the d____  because of the serious disease caused by the smog. Quite a lot of flights have to be put off. A great number of people have to stay at h____ for fear of the poisonous air caused by the smog.
      People have realized the great harm caused by the smog and the importance of p____  the environment. People from all over the country are taking actions to reduce the smog weather. The g____  asks people to go to work or school with the public traffic, such as the bus and the u____ . Also we should plant more trees.
    According to me, I will go to school by bike or on foot, and I won't throw the waste a____ . In addition, I will tell the people that all of us should try our best to protect the environment. Would you like to tell me some good ideas? I'm looking f____  to your reply.
Yours,
Wang Hua

在四个实数$\frac{3}{2}$，0，﹣1，$\sqrt{3}$​中，最大的是（　　）