题干

图中是食肉目部分动物分类等级示意图,下列选项中亲缘关系最远的是: 
 

A:猫和虎

B:狼和犬

C:虎和狮

D:虎和犬

上一题 下一题 0.0难度 选择题 更新时间:2019-11-18 07:14:08

答案(点此获取答案解析)

D

同类题3

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    Every evening, 15-year-old Rashida returns home from school,changes out of her uniform, and rushes to a neighboring farm to help her motherharvest vegetables. Her father is disabled, so the modest profit the two ofthem earn must cover food, clothing and other necessities for all sevenchildren and their parents. Despite having precious little time to study,Rashida is one of the top students at her junior secondary school. But with somuch responsibility on her small shoulders, she admits that it is sometimeshard for her to imagine a more promising future.

    Last year, Rashida was invited to join 155 other girls at CamfedGhana's first Girls' Career Camp, a program designed to inspire girls growingup in the country’s Northern Region to dream big, and to support them to pursuethose dreams. “We organized this camp because we wanted to let girls know thateven if they are struggling with poverty, their lives will not be defined bylimitations,” says Dolores Dickson, Camfed Ghana’s Executive Director.

    Over the course of five days, the camp led the junior andsecondary school students through a range of experiences and career opportunities that were entirely new to them. Dr. Agnes Apusiga, a lecturer from the University of DevelopmentStudies, ran the workshop on goal-setting and career choices, describing theuniversities and training colleges in Ghana that could help them achieve theirdreams. Participants then visited the University for Development Studies, wherethey toured the medical school and science labs. Another highlight was aworkshop at the computer lab at Tamale Secondary School. Many of the girls hadstudied information technology from a book but had never before seen acomputer.

   “When the girls arrived at camp, they were not ambitious,because they didn't have any idea what the world held for them,” says EugeniaAyagiba, Project Officer with Camfed Ghana. “Many had scarcely traveled beyondtheir own villages.”

   “I think the most important thing that happened at the camp isthat we opened a window of hope for a group of girls coming from backgrounds ofpoverty,” says Eugenia. For Rashida, who has been laughed at in the past by herschoolmates because of her father's disability, the experience was important.“She told one of the camp mentors(辅导员) that whenshe is at school, she often feels like a misfit, and she prefers to keep toherself,” says Eugenia. “But at the camp, it was different. She made friendswith girls who have similar struggles. She took part in every single activity,every single game. On the last day, she said to her mentor, ‘The camp haschallenged me to study hard. Now I see that there is light at the end of thetunnel.’

同类题5

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    A 15-year-old student who invented a flashlight(手电筒) getting power from the holder's body heat is going home today from California with a big prize and a chance to do further research.

    Ann Makosinski was the only Canadian among the four winners at Google's international science competition. Thousands of young scientists from around the world took part in the competition.

    Winning the science and technology competition was "a surprise". Ann said, "I think it will have a great influence on my future."

    Ann thanked her family for encouraging her interest in science and said that her first toy was a box of transistors(晶体管).

    Ann's prize includes $ 25,000 and a "once in a-lifetime expericnce" from Google for her Hollow Flashlight, which has no moving parts or batteries.

    The idea for the invention came from seeing unwanted batteries and her friend's experience. When Ann visited a friend in the Philippines, she saw the friend couldn't study when it became dark because there was no electricity or light. She saw the need for a flashlight that has no batteries - Hollow Flashlight.

    In her project, Ann wrote "I made two flashlights that do not use any batteries or harmful materials. They do not create any noise and will always work. The flashlight needs at least a 5℃ temperature difference between the holder's body and the environment around to produce light."

    A video of Ann explaining how she creatcd the flashlight has been watched more than 1.4 million times on the Internet.

    Though Ann was successful, she has not made a decision about her career path. Ann hopes that she can find a way to join her love of film and science together.

    The four winners were chosen from 15 final competitors from eight countries. The competition attracted thousands of students in 120 countries.