1869年2月，美国国会通过的第15条宪法修正案规定：“合众国或任何一个州对于合众公民的投票权，不得因种族、肤色或曾为奴隶，拒绝或剥夺之。”这法案获得通过的原因是（    ）

读世界某区域某日海平面等压线（单位：hpa）分布图，回答下列问题。

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

下列关于单项式-$\frac{3}{5}$xy²的说法中，正确的是（　　）

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

M：What are you surfing for on the Internet, Jane?

W：I ____(hunt)for another apartment.

M：Why? You mean we should move to a new house?

W：It may be a daydream. ____ this apartment ____ we are livingis too small.

M：I agree. But this apartment is near our company at____(little)．

W：Perhaps we can buy a car?

M：That will make ____ life tiring, Jane.

W：I dream ____ having a house with a garden. I could plantmany flowers.

M：Sound great? But have you found an advertisement____(make)you interested?

W：____ is an interesting advertisement.

M：Glad to share a daydream with you! Where is it located?

W：It is next to the railway station and it is only half ____hour's ride.

M：How many bedrooms?

W：Three bedrooms, 4 unfurnished houses, a fenced yard, one­cargarage.

M：Sounds just for us! How much is the ____？

W：The ad says $415 amonth.