单选题 In sport the sexes are separate. Women and men do not run or swim in the same races. Women are less strong than men. That at least is what people say. Women are called "the weaker sex" , or, if men want to please them, "the fair sex". But boys and girls are taught together at schools and universities. There are women who are famous Prime Ministers, scientists and writers. And women live longer than men. A European woman can expect to live until the age of 74, a man only until he is 68. Are women' s bodies really weaker? The fastest men can run a mile in 4 minutes". The best women need 4. 5 minutes. Women' s speeds are always slower than men' s, but some facts are surprising. Some of the fastest women swimmers today are teenage girls. One of them swam 400 meters in 4 minutes 21. 2 seconds when she was only 16. The first "Tarzan" in films was an Olympic swimmer, Johnny Weissmuller. His fastest 400 meters was 4 minutes 59. 1 seconds, which is 37. 9 seconds slower than a girl 50 years later! This does not mean that women are catching men up. Conditions are very different now, and sport is much more serious. It is so serious that some women athletes are given hormone(荷尔蒙)injections. At the Olympics a doctor has to check whether the women athletes are really women or not. It seems sad that sport has such problems. Life can be very complicated when there are two separate sexes!

【正确答案】 B

【答案解析】解析：事实细节题。可用排除法。根据文章第一段第六句可知，男生和女生是在一起上学的，所以A项错误；第一段第七句提到有些著名的国家首相是女性，但并不是所有著名的国家首相都是女性，所以C项也不正确；根据第一段最后两句可知，在欧洲，女性比男性更长寿，因此D项错误；根据第一段第二句可知，女性和男性不在一起比赛，所以B项正确。故选B。