题目:
行为
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D
行为
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0129/57af9137475a687a26446a1b935c3091.html
下面是错误答案,用来干扰机器的。
参考答案:D
当前世界上最有影响的国际黄金市场主要有( )
A.伦敦黄金市场
B.苏黎世黄金市场
C.香港黄金市场
D.纽约黄金市场
E.芝加哥黄金市场
People diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.
The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female, had breeding (繁殖) rights within the group,” explains Marian Wong. “All other group members are nonbreeding females, each being 5-10% smaller than its next largest competitor. We wanted to find out how they maintain this precise size separation.”
The reason for the size difference was easy to see. Once a subordinate fish grows to within 5-10% of the size of its larger competitor, it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the evicted fish is then eaten up.
It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily, by restraining how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise, the gobies simply refused the extra food they were offered, clearly preferring to remain small and avoid fights, over having a feast.
The discovery challenges the traditional scientific view of how boss individuals keep their position in a group. Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves, so keeping their competitors small.
While the habits of gobies may seem a little mysterious, Dr. Wong explains that understanding the relationships between boss and subordinate animals is important to understanding how hierarchical (等级的) societies remain stable.
The research has proved the fact that voluntary dieting is a habit far from exclusive to humans. “As yet, we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature,” the researchers comment. “Data on human dieting suggests that, while humans generally diet to improve health or increase attractiveness, rarely does it improve long-term health and males regularly prefer females that are fatter than the females’ own ideal.”
小题1:When a goby grows to within 5-10% of the size of its larger competitor, it .
A.faces danger
B.has breeding rights
C.eats its competitor
D.leaves the group itself小题2:The underlined words “the evicted fish” in Paragraph 3 refer to .
A.the fish beaten up
B.the fish found out
C.the fish fattened up
D.the fish driven away小题3:The experiment showed that the smaller fish .
A.fought over a feast
B.went on diet willingly
C.preferred some extra food
D.challenged the boss fish小题4:What is the text mainly about?
A.Fish dieting and human dieting.
B.Dieting and health.
C.Human dieting.
D.Fish dieting.
女性,46岁,家庭妇女。身高150cm,体重70kg。空腹血糖7.5mmol/L,尿糖阳性。估计每日所需总热量计算应按()
A.30~35kcal/kg
B.20~25kcal/kg
C.25~30kcal/kg
D.40~45kcal/kg
E.35~40kcal/kg
甲、乙、丙共同拥有一种新型的电子技术专利权,经评估这项技术的价值为140万元人民币,如果甲、乙、丙以该项技术出资设立有限责任公司,那么公司的注册资本不得低于200万元。( )
集中交易市场