被称为线刻、阴刻的技法是（）。 A.浮雕 B.圆雕 C.透雕 D.线雕

阅读理解。

    That little "a" with a circle around it is most commonly used as the "at" symbol. The symbol is usually

found in e-mail addresses. Surprisingly though, there is no official (官方的) name for this symbol, there

are lots of strange ways to describe the @ symbol. Before the @ symbol became the popular symbol for e-mail, it was used to show the cost of something. For example, if you bought 6 apples, you might write

6 apples @$1.10 each.

    As e-mail is becoming more and more popular, the@symbol or the"at sign is used between a person's

online user name and his mail server address, for example, joe@126.com. The symbol's use on the

Internet made it necessary for people to put this symbol on keyboards in the countries that had never seen or used the symbol before.      

    The actual origin (起源) of the @ symbol remains a mystery. According to an ancient western legend, during the Middle Ages before the invention of the printing press (印刷机), every letter of a word had

to be written by hand for each copy of a book. The monks (僧侣) looked for ways to make the letters

of common words less. Although the word "at" was quite short, it was quite a common word in texts and

documents. As a result, they circled around "a" and created @.

根据短文内容，选择最佳选项。

1. What did someone mean by writing 5 pears @$2.0 each in the past?

A. He bought 5 pears for free.  

B. He paid $7.0.

C. 5 pears cost $2.0.  

D. Each pear was $2.0.

2. Why did the monks in the old times create @ most probably?

A. Because @ could be printed very easily and clearly.        

B. Because they were ordered to invent some symbols.

C. Because they didn’t want to write the word "at" again and again. 

D. Because they wanted to make their texts or documents look special.

3. Which of the following is NOT true?

A. @ is often seen in e-mail addresses today.

B. The @ symbol has always meant the same in history.

C. The Internet makes @ become more popular.

D. The actual origin of @ is still difficult to explain.

4. What do we know from the passage?

A. @ was used before the Middle Ages.

B. @ is still always used to show prices of goods now.

C. No one had seen @ before it was put on the keyboard.

D. There was no @ on keyboards in some countries before.

5. Which is the BEST title for the passage?

A. What is @              

B. The secret of @

C. How to use @          

D. The actual origin of @  

脊椎动物与无脊椎动物最大的区别是身体内有由脊椎骨构成的  _____ 。

句中画横线的连词使用不恰当的一项是　　　 （　　）

A．国家支持、鼓励和组织教育科学研究，推广教育科学研究成果，促进教育质量提高。

B．无论业余作者和专业作家都要深入生活，学习社会。

C．适龄儿童、少年的父母或者其他监护人以及有关社会组织和个人，有义务使适龄儿童、少年接受并完成规定年限的义务教育。

刚刚收获的马铃薯块茎种到土壤中不能萌发，其原因是块茎含有较多的（），进入休眠期。要解除它的休眠，促使其发芽，可用（）处理。

在宏的参数中，要引用窗体F1上的Text1文本框的值，应该使用的表达式是______。

A．[Forms]![F1]![Text1]
B．Text1
C．[F1].[Text1]
D．[Forms]_[F1]_[Text1]