题目

Rajasthan is one of the most visited states in India. These top tourist places to visit in Rajasthan shouldn’t be missed. Jaipur The Pink City, Jaipur, is one of the Rajasthan’s most popular places. It has many famous forts（堡垒）and palaces, with most beautiful views and buildings. Staying in Jaipur is particularly enjoyable. Hotels are reasonably priced, which gives guests a very unforgettable experience! Ranthambore National Park Ranthambore National Park is one of the best places in India to spot a tiger in the wild. Compared with many national parks in India, it’s also图示为家鸽呼吸系统结构图，请据图回答 （1）鸟的体形呈         ，这样的结构特点在鸟类飞行中的意义是                。 （2）鸟用[4]    进行气体交换，并用[3]      辅助呼吸，这样的呼吸方式称为              。 （3）家鸽的体温高而       。