North America borders both the North ______ and the North ______.
Arctic Ocean, Indian Ocean
B. Atlantic Ocean, Pacific Ocean
C. Atlantic Ocean, Arctic Ocean
D. Indian Ocean, Pacific Ocean
Which of the following best expresses the main idea of the passage
A. It is optical fibers and lasers that have made the information superhighway possible.
B. People can communicate with each other more quickly now on the Internet.
C. It has taken quite a long time for the Internet to come into existence.
D. If one is seriously ill, he can always get help via the modem communication system.
本手术术后有效率一般为
A. 70%～80%
B. 80%～85%
C. 85%～90%
D. 90%～95%
E. 95%～100%
在设计阶段中，设计人员把经评审通过的各项需求转换成一个相应的体系结构，该体系结构是指______。
A. 数据体系结构
B. 系统体系结构
C. 软件体系结构
D. 以上全部
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