2．过程与方法

(1)通过同伴讨论，感受理性分析问题的方法，关注分享个人观点的合作过程。

(2)通过对具体物质的分析，感受由个别到一般的研究方法。

(3)通过建立学科知识的联系，结合物理学科中“受力分析图”，注意学科间相通的思维方式。

(4)通过归纳离子键形成的条件，关注综合能力和概述能力。

1．知识与技能

(1)理解化学键的概念和离子键的概念，并理解离子键是化学键的一种形式。

(2)通过对具体物质的剖析和作图，理解离子键形成的原理，以及典型离子键的形成过程，并归纳其形成条件。

20. What do we know about the farm?

　 A. It is very difficult to find.　　　　　　 B. It is situated near the river.

　 C. It is open only at the weekend.

19. How much does a family ticket cost?

　 A. 4 Pounds.　　　 B. 6 Pounds.　　　　 C. 15 Pounds.

18. What is the speaker’s purpose in giving this talk?

　 A. To make a farm known to the public.

　 B. To ask people to move to a farm.

　 C. To pool money to open a farm.

17. What can we learn from the conversation?[

A. The man doesn’t know how much the rent is.

B. The woman has decided to rent the house.

C. The woman is quite satisfied with the house.

听下面一段对话，回答第18至20三个小题。中

16. Why does the man refuse the woman’s request now?

A. He needs time to consider it.　 B. He isn’t the owner of the house.

C. He thinks this house worth a high rent.

15. What does the woman want the man to do?

A. To cut down the rent.　　　 B. To discuss with the landlord.　

C. To leave her the house at once.

14. What is the relationship between the two speakers?

A. Agent and tenant.　　　　 B. Agent and landlord.　　　　 C. landlord and tenant.

13. Where do the two speakers finally decide to go?

　 A. To a concert.　　　　　　　 B. To the library.　　　　　 C. To the theatre.

听下面一段对话，回答第14至17四个小题。