题目

It is hardly surprising that clothing manufacturers (生产商) follow certain uniform standards for various features (特征) of clothes. What seems strange, however, is that the standard adopted for women is the opposite of the one for men. Take a look at the way your clothes button. Men’s clothes tend to button from the right, and women’s from the left. Considering most of the world’s population?men and women?are right-handed, the men’s standard would appear to make more sense for women. So why do women’s clothes button from the left?History really seems to matter here. Buttons fi生活中一些常见的食物近似PH如下，其中酸性最强的食物是（　　）A. 西瓜汁（5.3～6.2） B. 苹果汁（2.6～3.3）C. 牛奶 （6.3～6.6） D. 鸡蛋清（7.6～8.0）