18
未知类型：{'options': ["It's the cradle of civilization.", 'There are many kinds of birds.', 'There is plenty of species.', 'There are various species of fish.'], 'type': 102}
未知类型：{'options': ["It's the cradle of civilization.", 'There are many kinds of birds.', 'There is plenty of species.', 'There are various species of fish.'], 'type': 102}
举一反三
- How many_______known altogether A: species of fishes are B: species of fish is C: specieses of fish are D: species of fish are
- 濒危物种 未知类型：{'label': 'questionDesc', 'content': '选出正确的词组翻译。', 'isMemberControl': 0, 'type': 181} A: dangerous species B: endangered species
- Questions 22 to 25 are based on the following passage. What has happened since the end of the Ice Age A: Many species have moved further north. B: Many new species have come into existence. C: Many species have developed a habit of migration. D: Many species have become less sensitive to climate.
- Invasive species are defined as A: a species not native to an area that spreads and causes damage to the area B: species suited to stable environments that produce a few, relatively large offspring and provide parental care C: species suited to changing environments that produce many offspring and provide little or no parental care D: species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community’s structure
- The amino acid sequence of cytochrome c is used to reveal the organisms that are most closely related. Which of the following organisms are most closely related? A: Species R and S B: Species S and T C: Species T and W D: Species S and W