GSM移动通讯系统中,逻辑信道的数据速率约为(). A.几百bit/s到22.8ki

题型:单项选择题

问题:

GSM移动通讯系统中,逻辑信道的数据速率约为().

A.几百bit/s到22.8kit/s

B.几百bit/s到20kbit/s

C.几百bit/s到18kbit/s

D.几百bit/s到16kbit/s

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Mr. Smith gave his wife money every Friday evening. His wife always spent it all the next Wednesday, so that for the next three days she had no money to spend at all. One day Mr. Smith asked her, “But how did you spend all that money?” She answered, “I don’t know.” So one Friday evening, Mr. Smith gave her money together with an exercise book and a pencil. He said to his wife, “Please write down how you spend the money.” Next Tuesday, his wife had no money again. Mr. Smith took the exercise book to see how she had spent it. “I have done what you told me,” she said gladly. She had written “Friday, I got 18 pounds from Mr. Smith.” on the first page, and on the second page, she wrote, “Tuesday, I have spent it all.”

小题1: Mrs. Smith always spent all the money       .

A.the next day

B.in four days

C.in a week

D.on next Wednesday小题2: Mr. Smith gave his wife an exercise book and a pencil and asked her       

A.to do homework

B.to have a look

C.to write down how she spent the money

D.to draw a picture on it小题3:Mrs. Smith was        to do what Mr. Smith asked her to.

A.happy

B.sad

C.sorry

D.excited小题4: Mr. Smith gave his wife money        a week.

A.once

B.twice

C.three times

D.four times小题5: The story tells us that Mrs. Smith was not very       .

A.glad

B.tall

C.careful

D.good

题型:单项选择题

流行病学研究主要解决的问题是()。

A.疾病分布及影响分布的因素

B.疾病的防治措施

C.疾病病因

D.增进人群健康的策略

E.以上都对

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新中国成立后,我国在一些前沿技术领域取得了一批具有较大国际影响力的创新成果,下列全部属于近30年来取得的重大突破的一组是:

A.歌德巴克猜想、载人航天、古生物考古、南水北调

B.月球探测、核电工程、反西格玛负超子、陆相成油理论

C.超大规模集成电路、第三代移动通信、高性能计算机、超级杂交水稻

D.激光照排技术、量子通讯、古生物考古、人工合成牛胰岛素结晶

题型:单项选择题

水痘患儿隔离的时间是

A.至出疹后5天

B.至出疹后7天

C.至出疹后14天

D.至出疹后21天

E.至出疹后4周

题型:单项选择题

教育技术理论与实践的两个主要领域()。

A.教与学的过程

B.教与学的原理

C.教与学的资源

D.教与学的规律

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