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问题 选择题

中国是世界资源大国的依据是（　　）

A．总量巨大

B．开发情况好

C．人口众多

D．人均占有量大

答案

我国自然资源方面的基本特点是，总量丰富，但人均占有量少．根据题意．

故选：A．

单项选择题

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
Open Shortest Path First (OSPF) is a (36) routing algorithm that (37) work clone on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (38) processing power. The (39) algorithm is used to calculate routes. OSPF routing table updates only take place when necessary, (40) at regular intervals.

A．Bellman-Ford

B．Ford-Fulkerson

C．Dijkstra

D．RIP
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单项选择题

自由沉淀颗粒的沉淀速度根据所处水流状态的不同，有( )计算公式。

A．1个
B．2个
C．3个
D．4个
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