任何一个生态因子在数量或质量上的不足或过多，即当其接近或达到某种生物的耐受性限度...

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任何一个生态因子在数量或质量上的不足或过多，即当其接近或达到某种生物的耐受性限度时，就会使该生物衰退或不能生存。另外，在低温环境中，恒温动物身体的突出部分如四肢、尾巴和外耳等有变小变短的趋势，是减少散热的一种形态适应。这里涉及的规律或定律有（）

最小因子定律

耐受性定律

贝格曼规律

阿伦规律

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举一反三

【单选题】A tortoise can live ______ 150 years old. [ ]

up to

up at

up for

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【简答题】废物利用(环保手工创意)

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【单选题】The Emergency Position Indicating Radio Beacon on a cargo vessel must be stowed ______

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free if the vessel sinks

查看完整题目与答案

【单选题】下列关于集中化战略的说法不正确的是

集中化战略是针对某一特定购买群体、产品细分市场或区域市场，采用成本领先或产品差异化来获取竞争优势的战略

集中化战略可分为两类：集中成本领先战略和集中差异战略

集中化战略一般是大型企业采用的战略

实施集中化战略的风险之一是竞争者可能模仿

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【单选题】The Emergency Position Indicating Radiobeacon on a cargo vessel must be stowed（）.

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free if the vessel sinks

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【单选题】Each vessel in ocean and coastwise service must have an approved EPIRB．An EPIRB______．

must be stowed in a manner so that it will float free if the vessel sinks

is a devise that transmits a radio signal

must be stowed where it is readily accessible for testing and use

All of the above

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【单选题】The Emergency Position Indicating Radiobeacon on a cargo vessel must be stowed( )。

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free when the vessel sinks

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【多选题】废旧物品再利用的手工制作促进了幼儿哪些方面的提高?

判断能力

动手能力

创新能力

环保意识

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【单选题】They are too tired _____. [ ]

not to stand up

to stand up

to they stand up

stands up

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【单选题】Cut up the pear and then _____ . [ ]

mix up it

mix up them

mix it up

mix them up

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【单选题】The Emergency Position Indicating Radio Beacon on a cargo vessel must be stowed ______

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free if the vessel sinks

查看完整题目与答案

【单选题】下列关于集中化战略的说法不正确的是

集中化战略是针对某一特定购买群体、产品细分市场或区域市场，采用成本领先或产品差异化来获取竞争优势的战略

集中化战略可分为两类：集中成本领先战略和集中差异战略

集中化战略一般是大型企业采用的战略

实施集中化战略的风险之一是竞争者可能模仿

查看完整题目与答案

【单选题】The Emergency Position Indicating Radiobeacon on a cargo vessel must be stowed（）.

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free if the vessel sinks

查看完整题目与答案

【单选题】Each vessel in ocean and coastwise service must have an approved EPIRB．An EPIRB______．

must be stowed in a manner so that it will float free if the vessel sinks

is a devise that transmits a radio signal

must be stowed where it is readily accessible for testing and use

All of the above

查看完整题目与答案

【单选题】The Emergency Position Indicating Radiobeacon on a cargo vessel must be stowed( )。

in an inside passageway

in an approved bracket

so that it is accessible from the bridge of the vessel

so that it will float free when the vessel sinks

查看完整题目与答案

【多选题】废旧物品再利用的手工制作促进了幼儿哪些方面的提高?

查看完整题目与答案

【单选题】They are too tired _____. [ ]

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【单选题】Cut up the pear and then _____ . [ ]

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