根据短文内容的理解，选择正确答案。

A

    Skin­diving is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under the water, it is easy for you to climb big rocks, because you are no longer heavy.

    Here, under the water, everything is blue and green. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands.

When you have tanks of oxygen on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.

    To catch fish is one of the most interesting parts of this sport.

    What's more, there are more uses for skin­diving. You can clean ships without taking them out of water. You can get many things from the deep sea.

    Now you see that skin­diving is both useful and interesting.

首届“创造新的文化遗产”论坛指出，“我们应站在文化继承和创新的高度上审视历史和未来，力争在实践中多留遗产，少留遗憾”，为后人创造出更多“新”的文化遗产。如《亮剑》、《闯关东》、《士兵突击队》、《我的兄弟叫顺溜》等原创作品的热播就突出了花心思的“新”。这里突出强调“新”，是因为
①文化创新可以不断推动社会实践的发展 
②文化创新是社会实践发展的内在动力   
③文化创新可以促进民族文化的繁荣
④离开了文化创新，文化就会成为无源之水、无本之木

东北是我国重要的水稻产区。有关东北水稻种植的说法，正确的有(  )

①水稻是东北产量最高的粮食作物 ②水稻种植比例由南向北逐渐增加 ③水稻种植已扩展到北纬50°以北的黑龙江沿岸 ④东北水稻种植业的发展方向是规模化、专业化、生态化

（2015秋•固镇县期末）将几种图示与其代表的气现象连接起来．

填空

____×____+____＝____