留学群高考网为大家提供高考英语阅读理解练习题及答案(5)，更多高考英语资讯请关注我们网站的更新! 高考英语阅读理解练习题及答案(5) The fiddler crab (蟹) is a living clock. It indicates(=shows) the time of day by the colour of its skin, which is dark by day and pale by night. The crab’s changing colour follows a ...