在渔业生产上为获得持续最大捕捞量,海洋捕捞时,应使鱼类的种群数量保持在( )

在渔业生产上为获得持续最大捕捞量,海洋捕捞时,应使鱼类的种群数量保持在( )A.K/2B.K/3C.K/4D.K/5

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在下列说法中,正确的是( )

在下列说法中,正确的是( )A.K对策者有较强的竞争能力B.K对策者个体小、寿命短、存活率低,但增殖率高C.K对策者适应多变的栖息环境D.K对策者是以提高增殖能力和扩散能力取得生存机会的

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女性,21岁,题中60kg。烧伤面积40%,伤后第一个24小时的补液总量为A 4400ml B 5000ml C 5600ml

女性,21岁,题中60kg。烧伤面积40%,伤后第一个24小时的补液总量为A 4400ml B 5000ml C 5600ml D 6200ml E 6800ml

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So quickly ______ their work that they were given a bonus.

So quickly ______ their work that they were given a bonus.A. did the workmen finishB. the workmen fin

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______had he arrived home than it began to rain.

______had he arrived home than it began to rain.A. Not untilB. No soonerC. ScarcelyD. hardly

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