问题 名词解释

球间牙本质

答案

参考答案:

牙本质主要是球形钙化,由很多钙质小球融合而成。在牙本质钙化不良时,钙质小球之间遗留一些未被钙化的间质,称为球间牙本质,其中仍有牙本质小管通过,但没有管周牙本质结构。球间牙本质主要见于牙冠部近牙釉质牙本质界处,沿着牙的生长线分布,大小形态不规则,其边缘呈凹形,很像许多相接球体之间的空隙。

阅读理解

The holiday’s upon us.After months of study, you have some time to yourself.So, why not read a book? Well, some people will say, “Why trouble with books? We have the Internet and other media (媒体) that offer a lot more colorful programs.Books are history!”

But don’t be fooled.There’s still a lot to be said for reading-and reading as widely as possible.

(1) One clear reason is that a well-chosen ______ is a wonderful collection of ______ and expressions, so long as you have a good dictionary, of course.Believe me, it’s far easier to get new English words and expressions from a book or article than it is from the TV or the Internet.

(2) But an even more important point is that books give you something that modern media simply cannot. The webpage(网页)is always full of pictures and the text is often designed to make it as easy to read as possible.

Though “easy” may be welcome, unluckily it’s of little use for any long-time development of reading skills and the general language level.For that, there’s still no substitute(替代品)for a book.

But perhaps the best single reason is that simply choosing what you read and doing it by yourself means that it’s something you do by and for yourself.You can choose what you want to read.It’s hard work, but while you are reading, you’ll find that what once seemed like a duty is now a pleasure.Reading can bring us pleasure.

小题1:在(1)句空白处填入适当的词:___________  ___________

小题2:把(2) 划线句子翻译成中文:_______________________________________

小题3:回答问题: How many reasons for reading books does the text mention?

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小题4:在文中找出与下面句子意思相近的句子:It’s nearly useless.

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小题5:在文中找出最能表达文章主题的句子:

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单项选择题