题目内容
Though this kind of _______ has some _______, it is good enough for construction(建筑).
A.materials; shortcomings B.memorial; shortcomings
C.materials; distinctions D.memorial; distinctions
A
【解析】
试题分析:考查名词:materials;材料, memorial纪念碑, shortcomings缺点distinctions区别,句意:虽然这种材料有一些缺点,但是建筑的好材料。选A。
考点:考查名词词义辨析
点评:词汇辨析是每次试卷中必然出现的题型,所以平时一定要把词汇放在句中进行记忆。在复习词汇的时候,要依据语言的横向组合和纵向聚合,按照点-线-面顺序,构建知识网络环境,对知识内容进行巩固、深化和提升,这样才能提高复习知识点的效率。这样,再做单项填空题时,就会觉得游刃有余。对于英语中的词汇用法,平时要多归纳总结,词汇用法的特殊语法规则更要特别记忆。最好把词汇放在句子中,连同句子一起记忆,这样能够加强记忆。
What do you do if you are hit in the mouth and one of your teeth is knocked out? A dentist(牙医)may be able to put the tooth back in for you, but you have to get to the dentist first.In the meantime, you have to store the tooth so that it will stay healthy.
The simplest thing to do is put the tooth back into your mouth, or you could put it in milk.Frank Courts, a dentist at the University of Florida, worked with other researchers to find the safest way of keeping knocked-out teeth.He tried putting teeth into milk, into water, and into cell-culture medium(细胞培养液).He also tried, just drying the teeth in the open air.He used teeth that had to be removed from people’s mouths for various reasons.The teeth were put into one of the solutions(溶液)or stored in the air for one hour.Then cells from the root of the teeth were scraped-off the teeth.Dr.Courts and the others then studied how healthy these cells were.
The cell-culture medium worked best to keep a knocked-out tooth healthy outside the mouth.However, few people keep cell-culture medium handy at home or in school.
The next best thing was milk.But Dr.Courts said that the best thing of all was to wash the tooth and put it right back into its socket(牙槽)in the mouth.For some people, though, this is just too painful or upsetting.So milk will do, until you get your tooth (and your mouth)to a dentist.
【小题1】This passage is mainly about .
| A.how a dentist can save a knocked-out tooth |
| B.how to keep a knocked-out tooth healthy |
| C.how Dr.Courts and other researchers made their experiments |
| D.how to put a knocked-out tooth back into its socket |
| A.in cell-culture medium | B.in milk | C.in water | D.in the open air |
| A.milk works better to keep the tooth healthy | B.milk causes less pain |
| C.cell-culture medium is not usually handy | D.cell-culture medium is more expensive |
| A.cheapest and healthiest | B.least painful and cheapest |
| C.quickest and least painful | D.easiest and healthiest |