The football players in the local team were ___________ with money for their efforts in winning the competition
A. rewarded B. awarded C. praised D. valued
高三英语单项填空中等难度题
The football players in the local team were ___________ with money for their efforts in winning the competition
A. rewarded B. awarded C. praised D. valued
高三英语单项填空中等难度题查看答案及解析
Compared with the other players on the team, that footballer was short. But his speed _______ his small size.
A. compensated for B. headed for C. applied for D. pushed for
高三英语单项填空中等难度题查看答案及解析
As a champion team in the last World Cup, Germany’s football team was loaded with too much expectation from their fans in the group game ___ it lost the chance to go forward in this year’s game.
A. that B. as
C. when D. where
高三英语单项填空困难题查看答案及解析
______ to be a football player of the school team, the boy made up his mind to train even harder.
A. Having not chosen B. Being not chosen
C. Not having been chosen D. Having not been chosen
高三英语单项填空中等难度题查看答案及解析
________ individual players, we have a great team but the problem is that they don’t play football together well at all.
A. On top of B. By means of
C. In terms of D. In case of
高三英语单项填空中等难度题查看答案及解析
Although _____ by the opposite team, the players were not discouraged but practiced harder.
A. beating B. beaten
C. having beaten D. being beaten
高三英语单项填空中等难度题查看答案及解析
We were wild with joy when word came________our school team had won first place in the debate contest.
A.whether B.how C.that D.why
高三英语单项填空中等难度题查看答案及解析
If talks about a new deal________, the football player will have to leave the club with the end of his current contract.
A.break off B.break out C.break down D.break through
高三英语单项填空中等难度题查看答案及解析
In sports, sometimes a player has to take one for the team. The same appears to be true in the plant world, where reduced individual growth can benefit the broader community. The findings from the University of Michigan’s Paul Glaum and André Kessler of Cornell University help explain the persistence (持续存在) of some plant communities when theory predicts they should go extinct(绝种的).
“We looked at how chemical defense cues (信号) from plants, meant to prevent herbivores (食草动物), can also prevent pollinators,” said Glaum, a doctoral student in the U-M Department of Ecology and Evolutionary Biology. “The surprising model result is that while this can lead to fitness losses for individuals, the population effects can be positive for pollinators and plants under some circumstances.”
Many plants, including the wild tomato species used in this study, produce chemical compounds to repel (排斥) insect pests and other hungry herbivores. But those same chemical defenses can reduce the number of visits to the plant by pollinators such as bees, resulting in less pollination of individual plants and decreased growth.
“Biologists have puzzled over how such a costly defense mechanism (机制) can be maintained in these plant populations,” Glaum said. “How would a plant population with such a strategy persist?” Glaum and Kessler developed a computer model showing that decreased growth of individual plants can benefit overall populations and community resilience (恢复力) by indirectly controlling herbivore population growth. The results introduce mechanisms of persistence into communities previously found to be prone (易于遭受的) to extinction in theoretical models.
Tomatoes and other plants produce repellent chemicals called volatile (易挥发的) organic compounds in response to herbivore attacks. The presence of these so-called herbivore-induced volatile organic compounds can make the plant less attractive to pollinators, which can reduce pollen deposition (沉淀物) and negatively affect individual plants, an effect known as herbivore-induced pollinator limitation.
Previous modeling studies have looked at the direct effects of herbivory on a three-species community: flowering plant, pollinator and herbivore. Some of those studies predicted extinctions because growing herbivore populations would reduce the number of plants, limiting resources available to pollinators. In response, the pollinator population would decline, lowering plant reproduction.
1.According to the passage, the persistence of some plant communities may depend on __________.
A. chemical defenses of plants B. increased individual growth
C. reduced chemical compounds D. defense mechanisms of pollinators
2.The underlined word pollinator in Paragraph 2 probably refers to __________.
A. a kind of insects that help plants reproduce B. a kind of animals that eat plants
C. a process of forming a plant community D. a chemical that does harm to plants
3.Volatile organic compounds are __________.
A. less attractive to pollinators
B. able to have negative effects on individual plants
C. known as herbivore-induced pollinator limitation
D. chemicals produced by plants to attract herbivores
高三英语阅读理解困难题查看答案及解析
The result of the football match was 2 to 2，________the satisfaction of both teams.
A. with B. for C. at D. to
高三英语单项填空简单题查看答案及解析