题干

图一是八月份某一晴天,一昼夜中棉花植株CO2的吸收和释放曲线;图二表示棉花叶肉细胞两种细胞器的四种生理活动状态。请分别指出图一中表示时间的字母与图二中⑴、⑵、⑶、⑷所发生的生理活动相对应的选项是

A:d、e、f、g

B:d、c、b、a

C:e、g、a、h

D:f、c、b、d

上一题 下一题 0.0难度 选择题 更新时间:2018-04-10 09:04:37

答案(点此获取答案解析)

B

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完形填空

    Imagine loving someone so much that you'd swim more than 5, 000 miles to see him or her. Dindim manages to swim that far every year to 1 his friend Joao. This is 2 not only because of the love between the two friends, but because Dindim is3a penguin. Joao found Dindim covered in oil, barely 4on a beach near his home. He picked him up, cleaned him off and brought him to his house where he 5 him and got him healthy again. Joao named him Dindim.

    After a week, he 6 the penguin back to the beach and tried to release him,7 Dindim refused to leave Joao. They 8 together for the next eleven months. Then, Dindim disappeared.9 Joao thought he'd never see his friend again. But just a few months 10 Dindim was back. He found Joao on the beach, and followed him home. Each year he 11four months to live with other penguins. For the other eight months, he lives with Joao. Joao says that each time they meet again, Dindim seems 12 to see him. He says he loves the penguin as if he were his own 13 He feels certain that Dindim loves him in the14way. Ecologist Carl Safina says that animals can and do love humans. He writes and speaks a lot about animals and their 15. According to Carl, it's obvious that animals feel love for humans. What's less obvious is whether or not humans love animals enough to 16 them. Hundreds of thousands of animals are 17 by the same oil that covered Dindim when Joao found him.

    Fifty percent of 18 has disappeared in the last 40 years because of humans'19 their habitats. Scientists say we're in a new mass extinction period. In the next two 20 they predict that we'll lose 75 percent of the remaining species on earth.