The exam comes in July. When the exam finishes, the summer vacation begins. Boys and girls have two months to rest. The summer vacation is the best part of the year for most children. The weather is usually good. They can swim, go to summer camp or visit other places with their parents.

    We all know that the beaches are good places to relax. Some children are lucky to live near the sea. They can enjoy the sea at any time. But for the children who live far from the sea, they only go to the beaches for one or two weeks with their parents.

    Why do children like spending their summer vacation on the beaches? It is because they like the sand, the sun, the cool wind and the salt water. There are a lot of new things to see, nice things to eat and exciting things to do.

世界上使用人口最多的语言是____语，使用范围最广的语言是____语。

李鸿章认为：“古今国势，必先富而后自强，尤先富在民生，而国本乃可益固。”能够体现其上述思想的企业是（    ）

我国的北方地区和南方地区，在地形、气候、河流流量和植被类型等方面均有明显差异．（   ）