2015年8月1日施行的《税收减免管理办法》规定，纳税人申请减免税的，应当在政策规定的减免税期限内提出书面申请并等待批准。如果不符合法定条件而采用欺骗手段获取减免税的，税务机关将依照税收征管法有关规定予以处理。这表明（  ）

①税收是国家财政收入最可靠的来源 ②强制性是税收的基本特征之一

③税收具有无偿性 ④纳税人既要行使权利又要履行义务

Why don't you _________your teacher for help?

His leg was badly injured in the accident and it still ______ the marks.

    There are many animals in the nature park. On the weekend, we go to the nature park with our teacher. Look! Two pandas are climbing trees. Three birds are singing.

Two tigers are playing on the grass. The monkeys are swinging.

    There is a hill in the park. Some students are in the woods. Chen Jie is playing with John. Zhang Peng and Mike are drinking water. Where is Sarah? Oh! She is watching the ants.