Which of the following, if true, would most help to explain the greater effect of zander on the native fish population?
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阅读冲刺练习
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题目来源
题目来源1 : 阅读冲刺练习
正确率：65%
难度：中
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题目内容
题目材料：
Sportfishers introduced the Zander, a type of perch, to Britain`s rivers and canals in the 1970s. Because zander eat large numbers of smaller fish, they have had a devastating effect on native fish populations. To protect the native fish, a government program removed a significant proportion of the zander from Britain`s waterways last year. Surprisingly, this year the loss of native fish to zander has been greater than before.
Which of the following, if true, would most help to explain the greater effect of zander on the native fish population?
- AThe climate in Britain is very similar to the climate in regions to which zander are native.
- BMost of the zander removed were fully grown, and fully grown zander eat large numbers of smaller zander.
- CEvery year a large number of zander are caught by portfisher in Britain`s waterway.
- DPrevious government program designed to remove nonnative species from Britain`s waterways have failed.
- EZander are just one of several nonnative fish that prey on the other fish found in Britain`s waterway.
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