一般地,　　　　　　　　　　　　　　　　　　　　　　 叫做A与B的并集.

记作 : 　　　　　　　　，读作:　　　　　　 ，即　　　　　　　　　　　　　 　

　　　　　　　　　　　　　　　　　　　　　　　 叫做A与B的交集.

记作 ：　　　　　　　　 　读作：　　　　　　 　　　即 　　　　　　　　　　

[活动过程2]：

观察集合A,B,C元素间的关系:A={6，8，10，12}，B={3，6，9，12}，C={3，6，8，9，10，12}，你发现了什么？

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处错误，错误涉及一个单词的增加、删除或修改。　 增加：在缺词处加一个漏词符号(∧)，并在此符号下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者(从第11处起)不计分

Dear Rose，

Thank you for your lastly letter and your concern about my life after I moved to other school．The school is near my home ,so it is too more convenient. All my new teachers and classmates are very kind to me, which make me very comfortable. Yet I still miss for my former teachers and classmates very much. The only problem is that I have not yet gotten used to the teaching methods there, so I usually take a long time to understand the teacher says. Besides, don’t worry. I am sure that I can manage with the help of the teachers. What is your study recently? I am looking forward to hear from you soon.

　　 Yours,

　　 Mike

76-80根据短文内容， 从短文后的选项中选出最佳选项， 选项中有两项为多余选项。(每题2分， 共10分)

D

__76____ . The bird can run at a speed of more than 20 miles per hour, and it can fly in short bursts at a speed of more than 50 miles per hour. Turkeys have excellent eyesight and hearing. If they have a sharp sense of smell, they’ll be almost impossibly forgetful.

__77__. One is their V-like scratches(抓痕)while getting food. And the other is the male turkey’s beaks, which are the size of a small finger with a bend at one end, like the letter “J”.

Native Americans in the Southwest and Mexico kept turkeys for feathers and food, and the birds with their alarm calls probably were good “watch dogs” as well. The Indians used the feathers in ceremonies, and used the feathers to form blankets. __78___.

The Spanish transported wild turkeys from Mexico to Europe for domestication(驯养)in the 16th century. ___79___.　 Finally, local decrease of wild turkeys paralleled(平衡)the E\European settlers’ spread across America. Today, widespread re- introduction programs are under way to return the five species of wild turkeys to their native habitats.

In the late 1770’s Benjamin Franklin suggested that the turkey should be the symbol of the United States. __80__. But the American turkey lost to the Bald Eagle by a single congressional vote.

A. There are two signs of turkey presence.

B. European settlers brought domesticated(驯养的)turkeys back to the New World.

C. Americans are trying their best to protect the American turkeys.

D. The American turkey is famous for some of its characteristics.

E. He argued that the bald Eagle was no better than a fish – eater.

F. So it has been very popular with Americans ever since.

G. They hollowed out(挖空)the large leg bones to serve as whistles.

76_______ 　　77______　　 78_______　 　79_______　 　80______

第二卷：写作(共35分)