已知偶函数f(x)满足条件：当$x\in R$时，恒有f(x+2)=f(x)，且$0\le x\le 1$时，有f(x)>0则$f\left(\frac{1}{2}\right),f(-\frac{1}{3}),f\left(2\right)$的大小关系为                           （  ）

2013年大学生志愿服务西部计划于4月16日启动。西部计划实施10年来，围绕国家西部大开发战略，共有14万多名青年志愿者参加西部计划，1.6万多人服务期满后扎根西部。西部计划（   ）

①有利于实现共同富裕 

②有利于少数民族地区的发展 

③有利于整个社会的和谐发展 

④帮助大学生志愿者将个人理想的实现融入到祖国的现代化建设中去

夏季，保存不当的食品和衣物表面很容易发霉．霉菌的生活受哪些非生物因素的影响呢？某实验小组对此进行了探究，其实验过程如下表内容，请据此回答下列问题：

木头、纸、金属、塑料硬度一样大（     ）

根据短文理解，选择正确答案。

    The size and shape of your ears show your character more than any other part of the face. Other parts of the face change shapes as we get older, but ears do not change their shape. They only change in size.

    Reading people's character from their ears is a very old science. In the past people thought that a person's ears with colour was dangerous. They also thought that the shape of the ears showed if a person was musical or not. Today, too many people believe that the size and shape of the ears help you know if a person is musical.

    Ears are all different, and each different thing has a meaning. Next time you look at a person, see if his or her ears are large, medium-size, or small. Look at the lobes（耳垂）. Do they stick to the face? Ears that are always red mean that a person may get angry easily. Ears that are always cold and nearly white colour mean that a person has a nervous(紧张的) character.