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【单选题】
有关三级文献资料特点的叙述中,最正确的是A.
很方便地对所需要的一级信息资料进行筛选
B.
能看到研究细节如试验设计、数据处理等
C.
提供的信息最新
D.
内容广泛、使用方便
E.
读者可以对文献进行评价
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举一反三
【单选题】The passage wants to ______.
A.
tell patients what they can do and what they can't
B.
tell people when they can visit patients and when they can't
C.
give patients guidelines on how to treat their illnesses
D.
give people ideas on how to treat their illnesses
【简答题】请写出创建sound类的完整代码?
【单选题】For many people in the United States who are concerned about the cost of heating homes and businesses, wood has become an alternative energy source to coal, oil, and gas. Nevertheless, wood will never...
A.
There are many competing uses for a finite supply of wood, and suppliers give the lumber and paper industries a higher priority than they give individual consumers.
B.
Wood produces thick smoke in burning, and its extensive use in densely populated cities would violate federal antipollution guidelines.
C.
There are relatively narrow limits to how far wood can be trucked before it becomes more economical to burn the gasoline used for transportation instead of the wood.
D.
Most apartment dwellers do not have adequate storage space for the amount of wood necessary to supply energy for heating.
E.
Most commercial users of energy are located within range of a wood supply, and two-thirds of United States homes are located outside of metropolitan areas.
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