（2015•南宁）复方篙甲醚（C₁₆H₂₆O₅）是一种治疗疟疾的有效药品．下列说法正确的是（　　）

如果$\frac{x+y}{y}$=$\frac{7}{4}$，那么$\frac{x}{y}$的值是（　　）

平衡是事物发展的一种状态。小到体操中人在平衡木上的行走，杂技中的骑车走钢丝、独轮车表演，直升机在空中的悬停等，大到人类的生存、地球的运转、天体的运行等等，都是保持平衡的一种状态。世间的万事万物，之所以能不停地运动、发展、前进，一个重要原因就在于保持了平衡。要使“平衡”成为人们的“大智慧”，就要（    ）

①全面理解绝对运动和相对静止的辩证关系

②正确处理主观与客观的辩证关系

③精确把握事物变化发展的条件

④善于协调事物内部各种因素的相互关系

阅读理解，选择正确的答案。

    April Fools'Day is a day to play jokes on others．No one knows how it began，but people think it first began in France．

    Each country celebrates April Fools'Day differently．In France，people call the April fools "April Fish"．They tape a paper fish to their friends' backs to fool them．When he or she finds this，they shout” April Fish!”

    In the UK，people play jokes only in the morning．You are a“noodle”if someone fools you．

    In the US，people play small jokes on their friends on the first of April．They may point down to your shoe and say，“Your shoelace iS untied．”If you believe them and look down，you are an April fool then．