与家兔适于草食生活的特点不相符合的是下列哪一项？（ ）
A．消化管很长
B．盲肠发达
C．臼齿发达
D．犬齿发达
A、消化管长是草食动物的特征，与家兔的植食性生活相适应．故不符合题意．
B、家兔消化的最大特点在于发达的盲肠及其盲肠内微生物的消化．家兔盲肠有适于微生物活动所需要的环境：较高的温度（平均41℃）、稳定的酸碱度（pH值平均为6.79）、厌氧和适宜的湿度，给以厌氧为主的微生物提供了优越的活动空间．盲肠微生物的巨大贡献是对粗纤维的消化．与家兔的植食性生活相适应．故不符合题意．
C、臼齿发达，适于磨碎食物，与其植食性生活相适应．故不符合题意．
D、犬齿的作用是撕裂食物，这样肉食性生活相适应．故符合题意．
故选：D
Even Intelligent People Can Fail 小题1:_________ The unusual things about the innovators (创新者) who succeeded in making our modern world is how often they failed. Turn on a light, take a photograph, watch TV, search the web, jet across the Pacific Ocean, talk on a cell-phone. The innovators who left us these things had to find the way to success through a maze (错综复杂) of wrong turns. 小题2:_________ We have just celebrated the 125th anniversary of American innovator Thomas Edison’s success in heating a thin line to white, hot heat for 14 hours in his lab in New Jersey, US. He did that on October 22, 1879, and followed up a month later by keeping a thread of common cardboard alight (点亮着的) in an airless space for 45 hours. Three years later he went on to light up half a square mile of downtown Manhattan, even though only one of the six power plants in his design worked when he turned it on, on September 4, 1882. 小题3:________ “Many of life’s failures,” Edison said, “are because that people did not realize how close they were to success when they gave up.” Before that magical moment in October 1879, Edison had worked out no fewer than 3,000 theories about electric light. But in only two cases did his experiments work. 小题4:________ No one likes failure, but the smart innovators learn from it. Mark Gumz, the head of a camera maker, attributes some of the company’s successes in technology to understanding failure. His popular phrase is：“You only fail when you quit.” 小题5:_________ Over two centuries, the most common quality of the innovators has been persistence (坚忍不拔). That is another way of saying they had the emotional ability to keep on with what they were doing. Walt Disney, the founder of Disneyland, was so penniless after a series of financial failures that he was left shoeless in his office because he could not afford the $1.50 to get his shoes from the repair shop. Pioneering car maker Henry Ford failed with one company and was forced out of another before he developed the Model T Car. |
