下面文章中有5处(第61～65题)需要添加小标题。请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题。选项中有一项是多余选项。A. Control

题文

下面文章中有5处(第61～65题)需要添加小标题。请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题。选项中有一项是多余选项。A. Control of RespirationB. Basic tips for prerving cut flowersC. Role of RespirationD. Most Important Aspect of Flower CareE. Need for Clean WaterF. Ways of Stopping Respiration小题1: __________ While everybody enjoys fresh cut flowers around his hou, few people know how to keep them for as long as possible. This may be done by keeping in mind a few simple facts. The key to keeping fresh cut flowers for a week or more without floral prervatives (which contain biocides that kill bacteria and fungus) is to keep the water fresh and the stems free of air pockets so they can continue to draw up water.小题2:__________ An important thing to remember about cut flowers is that they are nsitive to temperature. For example, studies have shown that cut carnations(康乃馨) retain their freshness eight times longer when kept at 12℃ than when kept at 26℃. Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care.小题3:__________ Flowers are not intended by nature to live very long. Their biological purpo is simply to attract birds or incts, such as bees, for pollination (授粉). After that, they quickly dry up and die. The process by which flowers consume oxygen and produce carbon dioxide, called respiration (呼吸), generates the energy the flower needs to give the flower its shape and color. The making of eds also depends on this energy. While all living things respire, flowers have a high level of respiration. A result of all this respiration is heat, and for flowers the level of heat relative to the mass of the flower is very high. Respiration also brings about the eventual death of the flower. Thus the greater the level of respiration, the sooner the flower dies.小题4: __________ How, then, to control the rate at which flowers die? By controlling respiration. How is respiration controlled? By controlling temperature. We know that respiration produces heat, but the rever is also true. Thus by maintaining low temperatures, respiration is reduced and the cut flower will age more slowly.小题5: __________ Another vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to “drink” water that is dirty or otherwi polluted. Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers. To rid the water of the unwanted substances, houhold chlorine bleach (含氯漂白剂) can be ud in small quantities. It is recommended that 15 drops of chlorine bleach (at 4% solution) be added to each liter of water. The water and solution should also be replaced each day. 题型：未知难度：其他题型

答案

小题1:B小题2:D小题3:C小题4:A小题5:E

点击查看序数词知识点讲解,巩固学习

解析

文章介绍如何护理保护修剪下来的花的建议，要在适当的温度修剪花，控制花的呼吸，还有用清洁的水等。小题1:考查段落大意题：从这段的句子：While everybody enjoys fresh cut flowers around his hou, few people know how to keep them for as long as possible.可知这段讲的是：保护修剪下来的花的建议：答案是：B小题2:考查段落大意题：从这段的句子：Keeping freshly harvested flowered at the right temperatures is probably the most important aspect of flower care.可知这段讲的是：花卉护理的重要方法，答案是：D小题3:考查段落大意题：从这段的句子：The process by which flowers consume oxygen and produce carbon dioxide, called respiration (呼吸), supplies the energy the flower needs to give the flower its shape and color.可知这段讲的是：呼吸的重要性，答案是：C小题4:考查段落大意题：从这段的句子：How, then, to control the speed at which flowers die? By controlling respiration.可知这段讲的是：怎么控制呼吸，答案是：A小题5:考查段落大意题：从这段的句子：Another vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to “drink” water that is dirty or otherwi polluted.可知这段讲的是：对清洁的水的需求，答案是：E

考点

据考高分专家说，试题“下面文章中有5处(第61～65题)需要添.....”主要考查你对 [序数词 ]考点的理解。 序数词

序数词的概念：

表示顺序的数称为序数词。如：first, cond, third, fourth。

序数词的构成与用法：

1、序数词的构成：①一般来说，是由相应的基数词加词尾th构成。   例：four＋th→fourth   six＋th→sixth    ven＋th→venth   ten＋th→tenth②下面这些基数词在变为序数词时，有特殊的变化。例：one→first    two→cond    three→third    five→fifth    eight→eighth    nine→ninth    twelve→twelfth③十位整数序数词的构成方法是将基数词的词y变成i，然后再加eth。例：twenty→twentieth    thirty→thirtieth    forty→fortieth    ninety→ninetieth④两位或两位以上的基数词变成序数词时，仅将个位数变成序数词。例：twenty－one→twenty－first    thirty－five→thirty－fifth    a hundred and fifty－three→a hundred and fifty－third2、序数词的用法：①序数词在使用时，一般加上定冠词。例：the first book    the cond floor    the third day    the fourth week．②序数词在多数情况下都用作定语，有的也可以作表语、主语和宾语。例：The may1st is Labour Day. 五月一日是劳动节。    My room is on the cond floor. 我的房间在二楼。    The first is larger than the con.（主语）第一个比第二个大。    Read the book from the first.（宾语）从开头读这本书。    You'll be the sixth to write.（表语）你将是第六个写的。③序数词的前面可以加上不定冠词，用来表示“再一”，“又一”的意思。例：You may have a third try. 你可以第三次尝试。

序数词知识体系：

 

约数的表达方法：

用tens/dozens/scores/hundreds/thousands/millions of 表示“几十、几百、上千、成千上万”等。 如：The boy bought dozens of pencils.       Thousands of people died in the earthquake. 注意： (A)：dozen, score, hundred, thousand, million等表示确切数量时，不用复数。 如：five dozen (of) eggs   五打鸡蛋    hree hundred people  三百个人

分数词的构成和用法：

1）分数词构成法：分数词（FractionalNumerals）由基数词和序数词构成，基数词代表分子，序数词代表分母。除了分子为1的情况下，序数词都要用复数形式：如：1/4：one-fourth    5/9：five-ninths    2/3：two-thirds   17/5：three and two-fifths   7/12：ven-twelfths   379/8：forty-ven and three-eighths此外还有下面表示法：如：1/2：a(one) half    1/4：a(one) quarter    3/4：three-quarters    9/4：two and a quarter    3/2：one and half     31/4：ven and three quarters