题目内容
| 阅读短文，从A-F中选出正确答案。 | |
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| I have heard that fluoride can help stop dental decay, but I recently read that it is poisonous. Which of these is true? How can children use fluoride safely? 1.______ This question is answered by Dr Marcia M. Rich who practises general dentistry in Newholt. She is also a lecturer at the University and a writer for the monthly magazine Your Dentist Cares. 2.______ My answer to the first question is to stress that fluoride works well and is safe when users follow instructions. Young children have a tendency to swallow toothpaste, which is why they should only have a tiny amount of fluoride toothpaste on their toothbrush. If this simple measure is taken, parents can be confident that children will be protected against tooth decay, and come to no harm. 3.______ Almost all medicines can have an adverse effect-or even be deadly-if they are not taken as directed. So you are right-fluoride can be poisonous if it is swallowed in very large quantities. It is for this reason that fluoride supplements can only be obtained on prescription from a doctor or a dentist. Please be assured that fluoride overdoses are rare-in fact, I have never heard of any fatal incidents related to fluoride poisoning. 4.______ Scientific studies have shown that fluoride can help to prevent cavities as long as it is used correctly. If fluoride is abused, there is a risk of illness or even death in extreme cases. If a deadly amount of fluoride is taken, immediate first-aid could save a life. A person who has swallowed a large amount of fluoride will probably start vomiting. lf not, the patient should be given milk or antacid and taken to the nearest hospital for emergency treatment. 5.______ Taking too much fluoride while teeth are growing can lead to a condition called dental fluorosis. The most likely cause is the swallowing of fluoride toothpastes by young children. It can also be caused by the inappropriate use of fluoride drops or other fluoride supplements, for example when fluoride is already present in drinking water. |
说明：阅读下面短文，根据短文内容从A-F选项中选出一个最恰当的选项作为每段的标题，选项中有一项为多余选项。
A. Current situation and future of reality shows
B. Audience’s reaction to reality TV
C. Critics’ relevant comments
D. Attractions for producers and participants
E. Definition of “watch and dial ”show
F. Introduction to new reality shows
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75.
“Big Brother” was probably the first of the new reality shows, but such a programme has developed. Many have found appeal(有吸引力) by having a theme to them, but most are based on the principle of “survival of the fittest” by eliminating(排除) participants(参与者) as the series progresses .So we have the dating shows where winners either pair off or stay true to their partners outside the TV studio. Then there are those that test people’s abilities for specific jobs like running a kitchen, becoming an interior designer or a top model.
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Critics say these programmes are basically bad television, but people watch them. So why are there so many of them? For the viewer it’s an opportunity to “people watch”. It’s natural to like watching other people. They’re interesting. We can imagine what we would do in that situation. We get to know the characters and see them grow and develop week after week. And of course, television is the perfect place to watch people. Like the theatre or cinema we can look at other people and they can’t look back. But with television, we can watch in our own homes. We watch, but we don’t have to admit it to anyone.
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The TV companies like reality shows because they are cheap to produce and attract younger viewers, which advertisers like. The last “Big Brother” in Britain attracted enormous(巨大的) advertising revenue. They aren’t dependent on “star” actors with enormous salaries. And your actors won’t go on strike. And why do people participate in them? Well, for fame and money of course. In the past, appearing on television wasn’t for ordinary people. You had to be good at something, like sport, or reading the news, or acting .But not any more
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It seems that most shows do well at the beginning but then the viewing figures begin to fall .And it varies from country to country too. For example ,one show had an adopted child try to guess the identity of her real father, and another had a family arguing over an inheritance（遗产）.Both were cancelled after one episode(一集). Perhaps the novelty(新鲜感) has worn off. Certainly, reality TV seems to appeal much more to the younger audience. And now there are so many shows around even the young have become more critical. Reality show will probably survive—it’s just no longer so easy to make a successful one .
74.
European television had the idea of taking ordinary people and turning them into “stars” by putting them in unusual situation. “Big Brother” (created in Holland) was one of the first. A group of people were locked in a small house with cameras running 24 hours a day. It was called a “watch and dial” show because viewers vote by telephone to decide who should leave or stay. 
76.
77.
78.