题目

孔雀鱼雄鱼的鱼身具有艳丽的斑点，斑点数量多的雄鱼有更多的机会繁殖后代，但也更容易受到天敌的捕食。关于种群中雄鱼的平均斑点数量，下列推测正确的是（） A . 若缺少天敌，斑点数量可能增加 B . 自然条件下，斑点数量多是不利变异 C . 天敌存在与否决定斑点数量相关基因的变异方向 D . 在自然界中，由斑点数量多的雄鱼产生的后代占据种群个体优势After 40 of the 70 days, he was ready to give up. “I was beaten down, completely humbled, ” admits Peters. Three weeks later he spoke to the local press(also part of the bargain), stating, “Not only is motherhood a difficult task, not only is it never-ending, it is an impossible job for any normal human being.” Bob and Pat were high school sweethearts. After they were married in 1960, she worked as a secretary to help put him through university. Since then Bob has been the football and wrestling coach at Palo Alto’s Cubberley High while Pat raised the kids. Then two years ago Pat went back to work as a secretary at Cubberley. “I had been around children so much,” she sighs(叹气), “I couldn’t talk to a grown-up.” She continued to run the household, however-until Bob signed the contract, whereupon she decided to relax and enjoy it. Although Peters had consulted(咨询) with his school’s home economics teachers and the head of the cafeteria(食堂), his meals were sometimes a disaster. “I tried to slip the butter I’d forgotten under the eggs after they were frying, ” he says. For the last three weeks, the family ate out a lot—sometimes having Macdonald’s hamburgers for lunch and dinner. As for housekeeping, a home economics teacher had told Bob that a room always looks clean if the bed is made. “I found an easier way-I shut the doors, ” he says. Soon the kids were wearing the same clothes for a week. “I made them wear their shirts inside out, and when we went to pick up Pat at work they turned them right side out so they would look clean.” Now that Bob has publicly admitted he was wrong, he is routinely(日常地) sharing the child-raising and household tasks with Pat. The tentative(暂定的) title of his book about the summer is taken from something he shouted at the kids one day.1.The couple signed the contract because _______. A.Pat complained a lot about her doing the housework all by herselfB.Bob loved taking care of children and wanted his wife to have a good restC.they agreed that husband and wife should share household tasksD.Bob thought it easy to take care of the family and wanted the experience for a book2.It was agreed that if Bob failed to keep to the contract, he would have to _______. A.pay a certain amount of moneyB.do all the housework for yearsC.say sorry to his wifeD.admit publicly he was wrong about motherhood3.What can we learn about Pat Peters? A.She was hard-working and selfless.B.She was pretty and kind-hearted.C.She was tired of the child-raising and household tasks.D.She did not love Bob any longer.4.Which of the following is true according to the passage? A.Bob managed to keep the kids’clothes clean.B.Bob tried to cook good meals for his children.C.Bob frequently took the kids out to eat because he was too busy at work.D.Bob taught the kids to make their beds every day.5.Which of the following can best end the news story? A.“My experience of being a mother.”B.“I’m proud of you all, my dear!”C.“Wait till your mother gets home!”D.“Motherhood: an impossible job for anyone.”