Questions 14～16 are based on the following talk. You now have 15 seconds to rend Questions 14～16.
The telephone that you will use before long will be much more complicated than the one you use today. It will be a video phone, a phone that can transmit and receive pictures as well as sound. With a video phone you not only hear, but also see the person you are talking to. People will be able to hold business conferences by using video phones. Each person in the conference will sit in his or her own office and talk with others in the conference held in other cities.
The telephone of the future will be more convenient to use than today’s telephones. You will be able to dial almost any city in the world. You will also be able to dial people from almost any place in the world, even if they live in the countryside. Besides being able to dial great distances, you will have less trouble with busy signals. When you call someone and the line is busy, you can simply hav
A. become screens of movie theaters
B. become as large as walls in home
C. have no change
D. become smaller
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A.随时 B.定期但不能随时 C.按计划但不能随时 D.按违规程度 [多选题]对断层的研究是必不可少的,如( )。
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[多选题] 以下哪些因素使血沉加快 ( )
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