— What's the weather like tomorrow?

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问题选择题

— There will be _____ rain. [ ]

A. strong

B. heavy

C. small

D. big

答案

答案：B

选择题

Unfortunately, when I dropped in, Professor Smith ________, so we only had time for a few words.

A．has just left

B．had just left

C．just left

D．was just leaving

单项选择题

OSI参考模型为计算机网络构建了一个易于理解的、清晰的层次模型。OSI参考模型是（）标准组织提出。

A.ISO

B.IEEE

C.ITU

D.IETF