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A.direction
B.operation
C.organization
D.assistance
答案
更多“In phone booths in the U.S. there are usually ( ) for using the telephone.”相关的问题
第2题
A.Receive level
B.Reception quality
C. C1 value
D.Interference index
第3题
A.Scarcely I had entered the room
B.had I scarcely entered the room
C.Scarcely had I entered the room
D.I had scarcely entered the room
第5题
A.在这个家里智能手机正在比这孩子得到更多的关注
B.在这个家里孩子更关注智能手机
C.孩子在家更关注智能手机
第6题
Two hours later, my friend telephoned me from the flat.At the moment, he said, he was listening to some of my re- cords after having just had a truly wonderful meal.He had found a pan on the gas stove and fried two eggs and had helped himself to some cold chicken from the refrigerator.Now he said, he was drinking a glass of orange juice and he hoped I would join him.I asked him if he had reached the flat without difficulty, he answered that he had not been able to find the key under the stone, but fortunately the living-room window just by the apple tree had been open and he had climbed in.I listened to all this in astonishment.There is no apple tree in front of my living room, but there is one in front of my neighbor's.
1.When his friend arrived from abroad the writer was______ .
A . at the airport
B . at home
C . still at the office
D . on his way home
2.As the writer was busy and couldn't go home on time, he asked his friend ().
A.to cook something for him
B.to have a meal and drink himself
C.to wait for him to have dinner together
D.to go into the kitchen and cook first
3 .Two hours later, the writer () .
A.got home and met his friend
B.was listening to some records
C.rang up his friend
D.got a phone call from his friend
4.Knowing his friend's arrival, the writer had ().
A.left the living room window open
B.asked his neighbor to receive his friend
C.managed to go home later than usual
D.hid the key for him somewhere near the door
5.The writer was surprised to find that his friend had () .
A.entered his neighbor' s house by mistake
B.entered his living room by climbing the apple tree
C.entered his house through a neighbor' s window
D.got into the living room with a neighbor' s key
第7题
Broadband is used for high-speed Internet connections at a fixed monthly rate.It turns an exciting telephone line into a high-speed digital line capable of carrying data up to 40 times conventional modem speeds.Any download is available at the click of a mouse-there is no dial-up as there is with standard Internet Service Providers.
For home owners and families there are many advantages.One of the most important is simultaneous(同时的)access to both telephone lines and the Internet.No queses and no delay.
For businesses, broadband can improve customer relations and provide direct access to corporate e-malls and databases.Entire operations can go online.
1.The function that broadband technology has on the new digital economy is ___.
A.further
B.critical
C.costly
D.global
2.How much does a user pay if he has broadband technology installed？ ()
A.It depends on the length of time
B.It depends on the times of dial-up
C.He pays at a fixed monthly rate
D.He pays a lot of money
3.Compared with the modem speed the broadband technology can transmit data___.
A.at up to forty times of ordinary speed
B.much faster
C.at a high-speed
D.within a second
4.Who can take advantage of the broadband technology according to the passage？ ()
A.Family members
B.College students
C.Both home owners and businessmen
D.Only businessmen and their partners
15.With the broadband technology companies can have all their operations done()
A.during the work days
B.during the whole week
C.online
D.offline
第9题
A.uFM(t)=UCcos（ωCt＋mfsinΩt）
B.uFM(t)=UCcos（ωCt－mfcosΩt）
C.uFM(t)=UC（1＋mfsinΩt）cosωCt
D.uFM(t)=kUΩUCcosωCtsinΩt
