下列字形没有错别字的一组是 ( ) A．闪烁、超凡脱俗、深奥、矫往过正 B．凌虐、

根据文章内容，回答下列问题。

     Once there was a rich man who lived with his wife and child. He loved the child so much that he sent him

to Oxford University for two or three years. At the end of the first year at the university, his son came home.

He wanted a change. And he also wanted to tell his parents about Oxford University.

     It happened one night that the father, the mother and their son were having supper. They had in front of

them only two chickens. Just as they were about to eat, the father said, "My boy, I have spent a lot of money

on you to send you to Oxford University. Now I want to know what you have learnt." The son smiled and said,

"Father, I have studied a science which can make prove that these two chickens on the plate are really three

chickens."

     "Well," said the father, "this is something I would like very much to know."

     "There are two chickens on the plate," said the son, he took one of the chickens in this hand and said, "Here

is one more, and one and two makes three. So there are three chickens." Then the father took one of the

chickens to himself, gave the other to his wife, and said, "I will have one of the chickens myself, your mother

shall have another, and you can have the third for your supper and nothing else." The father kept his words and

so his son went without his supper.

1. How did the father do to love his son very much?

    _________________________________________________

2. When did the story happen?

    _________________________________________________

3. Why did the father ask his son to do that?

    _________________________________________________

4. Did the son change the two chickens on the plate into three?

    _________________________________________________

5. There's no ending in the article, can you guess what the boy did in the end?

    _________________________________________________

分解因式：2a²-4a+2=（    ）。

在肺痈初期至溃脓期，应保持大便通畅是因为（）

A.肺与大肠相表里

B.大便不通会致神昏谵语

C.大便通畅，肺气可肃降

D.大便通畅，邪热易出，肺气宣降有权

E.大便通畅，则能进饮食

丙烯腈（CH₂=CHCN）是一种重要的化工原料，工业上可用“丙烯氨氧化法”生产。主要副产物有丙烯醛（CH₂=CHCHO）和异径（CH₃CN）和副产物丙烯醛（C₃H₄O）的热化学方程式如下：

两个反应在热力学上趋势均很大，其原因是（）；有利于提高丙烯腈平衡产率的反应条件是（）；提高丙烯腈反应选择性的关键因素是（）。

（2）图（a）为丙烯腈产率与反应温度的关系曲线，最高产率对应的温度为460℃。低于460℃时，丙烯腈的产率（）（填“是”或“不是”）对应温度下的平衡转化率，判断理由是（）；高于460℃时，丙烯腈产率降低的可能原因是（）（双选，填标号）。

A.催化剂活性降低

B.平衡常数变大

C.副反应增多

D.反应活化能增大

（3）丙烯腈和丙烯醛的产率与n（氨）/n（丙烯）的关系如图（b）所示。由图可知，最佳n（氨）/n（丙烯）约为（），理由是（）。进料气氨、空气、丙烯的理论体积比约为（）。

勘察合同示范文本按照委托勘察任务的不同分为(一)、(二)两个版本，分别适用于( )的委托任务。

A．岩土工程勘察、水文地质勘察
B．民用建设工程勘察、其他专业工程勘察
C．为设计提供勘察工作、仅限于岩土工程勘察
D．要求简单的勘察、要求复杂的勘察