① ___ can animals shake?
When we get wet, we need a towel (毛巾) to get ourselves dry. When a dog gets wet, all it needs is to shake its body. A study shows that a wet dog can shake off half the water on its body in less than a second. In fact, this common act of a dog works better than a washing machine.
The study found that animal shaking begins with the head and ends with the tail. During a shake, the animal’s head and skin all move. Smaller animals must shake faster than bigger animals to get water off. For example, in one second, a rat can shake 18 times, a dog 6 times, and a bear 4 times. Bigger animals can get their body dry with fewer shakes.
For animals, shaking is not just about getting themselves dry. It is also about saving their lives. Being wet makes animals heavier, and that makes them harder to run. ② In the animal world, how fast an animal can ___ often decides whether it will live or not. Maybe that is why the “wet-dog shake” has become a common habit of many animals.
任务一:回答问题
51. What should we do when we get wet according to the passage?
_____________________________52. What did the study find?
_____________________________ 任务二:补全内容
53. 根据材料内容,补全①处画线标题。(标题所给部分不用抄写在答题卡上)
_____________________________54. 根据以下所给单词提示,将材料②处画线句子补全,使上下文语义通顺、连贯、语法正确。(词数不限)run, decide, whether, alive, not(句子所给部分不用抄写在答题卡上)
_____________________________ 任务三:读用结合
55. 根据材料内容,完成以下柱状图(画出老鼠、狗和熊的Numbers of shakes in a second)。