定向发行的金融债券，经认购人同意，可免于信用评级。( )

下列函数中，在区间（-1，1）上是减函数的是（　　）

A．y=x^-1

B．y=x²

C．y=2^x

D．y=（x+1）^-1

2013年8月30日，十二届全国人大常委会第四

次会议在北京人民大会堂闭幕。与会全国人大代表表

决通过了全国人大常委会关于授权国务院在中国（上

海）自由贸易试验区暂时调整有关法律规定的行政审批的决定。这说明

①人大代表代表人民行使管理国家事务的权力 

②人民代表大会制度是我国的根本政治制度

③国务院行使最高立法权和最高决定权

④我国依法保障改革开放的顺利进行

A．①②

B．①②③

C．①②④

D．①②③④

According to traditional Cherokee beliefs, we are part of (1) . We don’t (2) with it and we’re not trying to (3) it. We are a part of the Great Life. And within the Great Life, there are three great Laws of Nature, which tell us how we have to live in (4) with everything else. The First Law of Nature is that you don’t take any life without real (5) . So we shouldn’t (6) needlessly. We believe everything is alive, including animals, plants and (7) . And so to us, taking the life of a plant is just as grave a 8() as taking the life of an animal. The Second Law is that everything we do should (9) the Great Life. And everything we do (10) the Great Life, and everything that (11) within the Great Life affects us. So it’s very important that what we do will not (12) other parts of the Great Life. The Third Law basically is that we don’t (13) where we live. And where we live is not our (14) , small community. It’s this (15) . We don’t pour chemical (16) down the drain because they all wind up in the water. It might seem a little difficult to live by those three laws in this (17) society. But there are still a lot of things that we can do to bring these laws into our lives, such as (18) , using the (19) as little as possible, and (20) gardening.

患者男，26岁，因上前牙牙面黑色横纹数年要求美齿修复。查体：唇面中央一横纹，与周围分界清晰，探针可探入，探痛（一）

最佳修复方式（）。

A.全冠修复

B.备洞后树脂充填

C.贴面修复

D.外漂白

E.均匀磨除表面釉质

周转率