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【单选题】
作为经济学萌芽的家政学所讨论的问题是?A.
家庭的投入和产出比例
B.
家庭生产和消费的比例
C.
家庭如何获得经济效益
D.
有限的收入获得家庭最大的经济福利
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皮皮学刷刷变学霸
举一反三
【单选题】The word which in the passage refers to
A.
migrations
B.
evolution
C.
geneticists
D.
populations
【单选题】我国从1980年开始利用国际金融组织贷款及外国政府贷款以来，国家发展和改革委员会、财政部、商务部等主管部委先后颁布一系列文件，旨在规范贷款资金的使用与管理。其中与外国贷款项目管理有关的主要文件是( )。
A.
《国际金融组织和外国政府贷款投资项目管理暂行办法》
B.
《世界银行和亚洲开发银行贷款项目国际招标代理机构委托指南》
C.
《外国政府贷款项下采购工作管理暂行规定》
D.
《机电产品国际招标投标实施办法》
【单选题】According to biologists, animal populations at a given time are _________ by food supplies at that time.
A.
governed
B.
sustained
C.
mediated
D.
manipulated
【单选题】The populations of bay scallops, oysters, and clams are threatened directly by______.
A.
the high diversity of fishes in the northwest Atlantic
B.
the catastrophic changes in the food web in the Atlantic
C.
the lethal reaction triggered by the overfishing of sharks
D.
the strong desire of many people for them as their delicious food
【单选题】Which of the following statements about deer populations is supported by the information in paragraph 4?
A.
Deer populations reached their highest point during the 1940s and then began to decline.
B.
The activities of settlers contributed in unexpected ways to the growth of some deer populations in later times.
C.
The clearing of wilderness land for construction caused biotic changes from which the black-tailed deer population has never recovered.
D.
Since the 1940s the winter populations of deer have fluctuated more than the summer populations have.
【单选题】Such a system set the stage for () increases in specific insect populations.
A.
expounding
B.
forgo
C.
explosive
D.
presided
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