(2018河南高考适应性考试)某兴趣小组研究放牧对草场物种丰富度的影响,结果如下图所示。下列有关分析错误的是( )
A.随着放牧强度的增加,该地区植物物种丰富度呈下降趋势
B.调查物种丰富度时,不能对采集到的数据取平均值
C.过度放牧会导致群落结构改变,影响生物多样性的间接价值
D.维持牧草和放牧数量的适宜比例,能保证高寒草甸不发生演替
新西兰兔因肉质好,适应能力强,是我国大面积养殖的优良肉兔。育种专家偶然获得了一种突变型肉兔虽然肉质差,但是生长速度比新西兰兔快很多。经研究发现肉质好与肉质差由等位基因D/d基因控制,生长速度快与慢由等位基因E/e控制。以多只纯合雄性新西兰兔与多只纯合雌性突变型肉免为亲本杂交,F1肉兔均肉质差生长速度快。让F1雌性肉兔与雄性新西兰兔测交,测交后代表现型为:
表现型 | 肉质好 | 肉质差 | 生长速度快 | 生长速度慢 |
数目 | 9个 | 11个 | 8个 | 10个 |
(1)如表同学的统计结果能否验证基因的自由组合定律 。试说明原因 。
(2)有人推测:基因E/e只位于X染色体上。请从测交后代的肉兔中选择材料,设计一个杂交组合,并写出能支持该推测的实验预期结果 。
(3)后经实验测定,上述两对等位基因分别位于两对常染色体上。请从测交后代的肉兔中选择材料,设计一个配种方案,选育肉质好且生长速度快的纯合雄性肉兔 。
《天工开物》中记载: “ 凡乌金纸由苏、杭造成,其纸用东海巨竹膜为质。用豆油点灯,闭塞周围,只留针孔通气,熏染烟光而成此纸,每纸一张打金箔五十度 ……” 下列说法错误的是
A . “ 乌金纸 ” 的 “ 乌 ” 与豆油不完全燃烧有关
B . “ 巨竹膜 ” 为造纸的原料,主要成分是纤维素
C . 豆油的主要成分油脂属于天然高分子化合物
D . 打金成箔,说明金具有良好的延展性
My faith in human nature has never been so great as it was last weekend after our family get-together in the town of Vail.
On Saturday, we all went to the market right in the middle of the town. Near the end, we all 11 at the fountain near the bridge, and the kids waded(蹚水)around in the fountain until we 12 . This is one of the busiest walking streets.
After we returned to the hotel late in the afternoon, my 7-year-old son Ponder 13 that nowhere could he find his backpack, which 14 his Gameboy and his watch. After a thorough 15 we determined that he must have left it at the fountain.
Ponder has never 16 anything. So we just take for granted that he needs no supervision(指导)for managing his 17 .
He was upset, not about the Gameboy, but about the watch. "But Dad," he said, through massive 18 , "they don't make that kind of watch anymore." We were all very 19 .
Our dinner reservation was at a restaurant just on the other side of the bridge, so I 20 him that we would not only search the area around the fountain when we went back for dinner, but we would also find the police and ask them if the backpack had been 21 .
As we exited from the parking garage, we could see the fountain as we walked down the long staircase. I saw something black 22 there, but it was right next to a woman standing by the fountain, so I could not 23 what it was or if it was hers.
"See it, Dad?" Ponder shouted. "Don't get too 24 because that may not be it," I said. But that was it. It had been five or six hours since we left the fountain, and it was 25 there. There was no ID in it, and it looked like someone had looked through it and then set it right out where all could 26 it.
I literally 27 when we reached it and it was his!Everyone in our party was blown away by this "miracle(奇迹)". In my wildest 28 , I would never have imagined that this could happen nowadays.
What a charmed life, eh? I believe this was a perfect 29 for a child in losing something important…to lose it and feel the full 30 of that loss, and then to miraculously get it back.
11.A.drove B.hiked C.met D.united
12.A.landed B.left C.settled D.slept
13.A.responded B.recognized C.realised D.recalled
14.A.contained B.combined C.comprised D.covered
15.A.preparation B.checkup C.revision D.search
16.A.wasted B.lost C.sough D.deserted
17.A.emotion B.time C.money D.stuff
18.A.tears B.fists C.reliefs D.outbreaks
19.A.hesitant B.curious C.sad D.eager
20.A.promised B.informed C.warned D.taught
21.A.worn out B.caught up C.put away D.turned in
22.A.hiding B.sitting C.swinging D.flowing
23.A.assess B.declare C.tell D.predict
24.A.excited B.puzzled C.relaxed D.amused
25.A.already B.even C.almost D.still
26.A.take B.see C.touch D.protect
27.A.panicked B.exploded C.collapsed D.cried
28.A.dreams B.claims C.efforts D.passions
29.A.mode B.lesson C.option D.plot
30.A.range B.pressure C.weight D.harvest
Job for You!
Family Alliance Meal Delivery Family Alliance is looking for people who can deliver hot Chinese meals one to two times a week for people with disabilities in north suburban Fairfield County. All applicants must have a driver's license and access to a car. Gas will be covered for each delivery. Working hours: 10 a.m. to 1 p.m. Tuesdays and Fridays For more information, contact Charles Chen at cchen@famd.com Or call 740-6668988 | Lancaster Design We provide full furnishings, like donated kitchen equipment and furniture items, for the new homes of people who were oncehomeless. We need people who can work at our warehouse (仓库) sorting and packing items to be delivered to families, repair donated furniture and more. Candidates will be matched with a task based on skill set. Interested? Submit your application to www.lancasterdesign.org Or call 740-6119735 |
Lancaster Weekly Would you like the opportunity to earn extra cash close to home? If so we have a vacancy in our team which would suit you. Both adults and youngsters aged 13+ are required to deliver our newspaper. You may I have to cover some distance. Bicycles are available if needed. Working hours: 8 a.m. to 10 a.m. Saturdays For more information Call 740-6538360 | Parkview Nursing Home Caregivers are wanted. We seek people who are patient and caring, and who have experience and interest in working with older adults. As part of the package, initial and follow-up training sessions are provided and accommodation is available if required. For more details, visit us at Unit 3 Park View Lane Or contact Ellen White a t 740-6968399 |
1 . Which job requires a driver's license?
A . Delivering meals.
B . Delivering newspapers.
C . Working at the warehouse.
D . Working at the nursing home.
2 . Which of the following is TRUE about the Lancaster Design job?
A . Applicants are expected to design furniture.
B . Work is arranged according to one's skill set.
C . It involves collecting furniture from homes.
D . It favors applicants who are homeless.
3 . A middle-school student is most likely to be hired by.
A . Family Alliance Meal Delivery
B . Lancaster Design
C . Lancaster Weekly
D . Parkview Nursing Home
4 . Which number should you call if you want to work with the elderly?
A . 740-6668988.
B . 740-6119735.
C . 740-6538360.
D . 740-6968399.