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When we call a word "learned," we do not mean that it is used by learned per
A.so
B.since
C.but
D.for
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A.so
B.since
C.but
D.for
如果结果不匹配，请 联系老师 获取答案
更多“When we call a word "learned,"…”相关的问题
cancer. originally,because of a lawsuit that alleged such a link Network news programs ran their own tests of cell phones,reporting to the public that some cell phones exceed the maximum level of emitted radio frequency energy allowed by the US Federal Communications Commission.
In 2000.it was estimated that there were 92 million cell phone users in the United States and this number was growing by 1 million every month. More recently,the Cellar Telecommunications & Internet Association estimated that there were almost 170 million US cell phone users, and the seriousness of brain tumours, this is clearly a topic of wide concern.This report summarizes what we now know about the carcinogenicity of using cell phones.
Cell phones operate with radio frequencies.a form. of energy located on the electromagnetic spectrum between F M radio waves and the waves used in microwave ovens,radar;and satellite stations.Cell phones do not emit ionizing radiation,the type that damages DNA and is known to have the ability to cause cancer.
Cell phone technology works on a system of geographically separated zones called "cells" Each cell has its own "base station" that both receives and emits radio waves.When a call is placed from a cell phone,a signal is sent from the cell phone antenna to that cell's base station antenna.The base station responds to the cell phone signal by assigning the phone an available RF channel.When the RF channel is assigned,radio signals are simultaneously received and transmitted, allowing voice information to be carried between the cell phone and the base.The base station transfers the call to a switching centre.where the call can be transferred to a local telephone carrier or another cell phone.
6.There has existed argument about the link between cell phone and brain tumour.()
7.The rapid growing number of cell phone users has been a great concern in the US.()
8.The 3rd paragraph tries to prove that cell phones do not cause brain cancer.()
9.A switching centre is needed when we make a call through cell phone.()
10.The topic of the passage is about cell phone and cancer.()
1.The kid is 5 years old.()
2.The kid asked God for a smartphone.()
3.Smartphones have become an inseparable part of our daily life.()
4.We all need to connect and communicate in virtual world.()
5.The only solution to the head-down syndrome is called “digital break.()
just with homework.Qi, together with 10 other classmates made a volunteer group to call on people to join the Clean Your Plate Campaign (“光盘行动”).The 11 students went to many restaurants and told people the importance of saving food.“Excuse me, do you know that 950 million people around the world still haven’t got enough to eat？ Please don’t waste food.” They would say this kind of thing hundreds of times every day.The Clean Your Plate Campaign began on the Internet in January.It calls on people to reduce food waste.China in these years had serious problems with wasted food.CCTV reported in January that the food Chinese people waste every year is enough to feed 200 million people for a year.Chinese people are well known for being hospitable (好客的) and generous(大方的).Many even feel that they lose face if their guests have eaten all the food.Luckily, the campaign has got the support of many.In a restaurant in Xinjiang, the owner give the guests who have eaten all that they ordered a sticker (贴花).People can enjoy a free meal when they have 10 stickers.More than 750 restaurants in Beijing have begun to offer smaller dishes and encourage their guests to take leftovers (剩饭剩菜) home.To reduce food waste is a big task, and it needs time.It’s important that everyone does their bit, just like Qi.Did you finish your meals today？
6.What did the 11 tudents do in the winter vacation？ ()
A.The helped each other with homework
B.They opened a restaurant together
C.They volunteered for a campaign
D.They collected money from customers in restaurants
7.In this passage the underlined word “call on” means ______.
A.打电话
B.号召
C.拜访
D.叫喊
8.The Clean Your Plate Campaign calls on people to _____.
A.do volunteer work
B.work part time in restaurants
C.cut down on food waste
D.wash your plates after dinner
9.From Paragraphs 4-5, we learn that _____.
A.wasting food is a serious problem in China
B.Chinese people waste the most food in the world
C.Chinese people want to show off th at they are rich
D.most Chinese people are afraid of losing face at the table
10.What did the restaurant in Beijing do to support the campaign？ ()
A.The owner would have dinner with those who had eaten up their food.
B.It offered a free meal to the guests who had finished all their food ten times
C.It gave stickers to the guests who ordered small dishes
D.It encouraged customers to take leftovers home
converts packet into clock frequency().
A.call on
B.count on
C.sum up
D.relate to
A.far
B.more
C.further
D.deep
