科目: 來(lái)源:同步題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:同步題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:同步題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:北京模擬題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:浙江省月考題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:吉林省期中題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:0127 模擬題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:江西省模擬題 題型:閱讀理解
查看答案和解析>>
科目: 來(lái)源:0127 模擬題 題型:閱讀理解
閱讀理解。 | |
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 have a negative 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 the reason that fluoride supplements can only be obtained on prescription from the doctor or 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(牙洞) as long as it is used correctly. If fluoride is abused, there is a risk of illness or even deaths 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. If 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 inappropriate use of fluoride drop or other fluoride supplements, for example when fluoride is already present in drinking water. | |
查看答案和解析>>
科目: 來(lái)源:四川省模擬題 題型:閱讀理解
查看答案和解析>>
百度致信 - 練習(xí)冊(cè)列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專區(qū) | 電信詐騙舉報(bào)專區(qū) | 涉歷史虛無(wú)主義有害信息舉報(bào)專區(qū) | 涉企侵權(quán)舉報(bào)專區(qū)
違法和不良信息舉報(bào)電話:027-86699610 舉報(bào)郵箱:58377363@163.com