2014年是农历马年,仰天长啸的骏马寓意美好。下面关于“马”字的几种书体,在秦朝时被确定为全国规范文字的是哪一种  (    )

某商店中销售水果时采用了三种组合搭配的方式进行销售，甲种搭配是：2千克A水果，4千克B水果；乙种搭配是：3千克A水果，8千克B水果，1千克C水果；丙种搭配是：2千克A水果，6千克B水果，1千克C水果；如果A水果每千克售价为2元，B水果每千克售价为1.2元，C水果每千克售价为10元，某天，商店采用三种组合搭配的方式进行销售后共得销售额441.2元，并且A水果销售额116元，那么C水果的销售额是____元．

阅读短文,判断正误。

    All the students in China are learning English, but how can they learn English well? Some students can know a lot about English, they can do some exercises, but perhaps they can't speak English loudly.

    If you want to know how to swim, you must get into the river. And if you want to be a football player, you must play football.

    So, you see, you can learn English by using (使用) it. You must listen to your teacher in class. You must speak English to your classmates everyday and also you must watch some English cartoons, sing some English songs, write some English diaries.... Then one day you may find you can speak very good English.

保护动物多样性最主要的措施是