①现在患多动症的孩子越来越多，有的父母觉得这是“过度诊断”，医生只是在危言耸听，也许孩子只是太好动，让他们多运动就好了，菲尔普斯就是个例子。

②在办公楼施工现场，满眼望去，到处是热火朝天的施工景象，施工方相关负责人告诉记者，为了保证顺利完工，工人们两班轮换，不停施工。

③研究表明，WIFI发射器的辐射极小，且随距离不断减弱，一米外的辐射值就已微不足道。不过，还是建议将发射器放置在离床头1米范围之外，不用时尽量关闭电源。

④肥胖是世界卫生组织确定的十大慢性疾病之一，而中国的肥胖现状更是严霜烈日。世卫组织的最新报告显示，在我国现有近9000万肥胖者，这一数字已超越美国居世界首位。

⑤影片《湄公河行动》取材于当时惊天动地的“10·5湄公河跨国大案”，故事环环相扣、扣人心弦。其中，一场警察扮成商人与毒枭之间过招的戏码看得人惊心动魄。

⑥1917年，时任北大校长的蔡元培起用当时只是崭露头角的鲁迅先生设计北大校徽，可谓是慧眼识珠。鲁迅虽有忐忑，但交上的设计让蔡元培连声叫好，这一基本设计也沿用至今。

分式$\frac{\sqrt{5-x}}{x+2}$中，$x$的取值范围是（     ）

阅读下面短文，从每小题的四个选项中选出最佳选项。

Flying kites —a popular hobby

People have been making and flying kites for about 2,000 years. No one knows for sure who invented the kite. Some historians (历史学家) believe the ancient Chinese might start the kite flying 2,000 years ago. And now it is still a popular hobby in China, Japan, Korea and other countries of the Far East where beautifully decorated kites appear in different colors. In China, there is even a special Kites Day on which children and adults fly kites. In Japan, families fly fish kites on Children's Day, May 5th.

    Simple kites are made by crossing two sticks and covering them with paper or cloth. And then people put a string at the end.

    Kites are made in many different sizes, colors and shapes. A flat kite is the oldest and simplest type of kite. It flies because air flows over and under the kite's wings. The pressure under the wings helps the kite lift into the air.

    Today most people fly kites as a hobby. Kite festivals are organized in many parts of the world.