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【单选题】
下列有关群落的叙述,错误的是A.
群落有垂直结构和水平结构
B.
演替是生物群落的特征之一
C.
群落中物种之间是相互联系的
D.
群落是由空气、生物组成的
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举一反三
【单选题】Tom likes doing things with his family. He’s learned much from ___ His family help him a lot.
A.
it
B.
them
C.
he
D.
they
【简答题】市场上,面值 100元的2年期和4年期的零息债券的市场价格分别为98元和86元。要求:(1)计算2年期零息债券的到期收益率;(2)如果按4:6比例将2年期和4年期的零息债券构建一组合,计算该组合的久期。
【简答题】短期绩效奖励计划有哪些类型？各自的基本内容和特点是什么？
【单选题】A) He loses his family because he worked too hard. B) He loses his work because of his family. C) He is not regretful for what he did. D) He doesn’t get on well with his family because he worked too h...
A.
He loses his family because he worked too hard.
B.
He loses his work because of his family.
C.
He is not regretful for what he did.
D.
He doesn’t get on well with his family because he worked too hard.
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