关于铁及其化合物的性质和用途的叙述中，正确的是 A．用铝锅炒菜比用铁锅好 B．F

任务型阅读 (共30分，每题2分)

　　Passage E

Sending E-cards on the Internet

　　The Internet has changed our habits, including our habit of sending greeting cards. There are many e-card websites that make it so easy to find the right greeting cards. They have greatly changed the way we send greetings to each other.

　　Our lives have become so busy that we have limited personal time . These e-card websites have allowed everyone to easily share their feelings and emotions(感情) with the people they love. They contain (包括)plenty of greeting cards that can be used immediately. The users can choose any card they like, from festival greetings to birthday wishes. In fact, e-cards are perfect for any event. That’s why more and more people like to send e-cards. If the users are interested in making their own greeting cards on the Internet, they can create a card within only a few minutes.

　　Another benefit(好处) of e-card websites is that they have made it possible for us to send top quality cards to our beloved(心爱的) ones and surprise them with cheerful greetings. They allow us to send our greetings on a specific(特定的) date. So we can plan for the occasion(场合) when we want to send the card. For example, we can send our e-card on a certain day and then visit the person with some flowers the next day. This will surely create a good impression(印象) on the person we love.

　　We have never forgotten the importance of saying sorry to our beloved ones. But sometimes we fail to do so because, we are not brave enough to face those we hurt. Some e-cards on these websites allow us to express our feelings in a more thoughtful way.

　　Although some people still would rather buy traditional cards in the shops for the persons they love, especially when they want the cards to last a long time, more and more people are choosing to send greetings on the Internet.

鉴别日常生活中的下列各组物质，操作1和操作2均不正确的是

一个足球运动员用100N的力踢一个重为5N的足球，球离脚后在水平草地上向前滚动了30m．在球滚动的过程中，运动员对足球做的功为（　　）

A．3000J

B．500J

C．150J

D．0J

治疗TMD首选的方法为（）

A．第三磨牙伸长

B．保守治疗

C．关节内注射硬化剂

D．夜磨牙

E．手术治疗

诊断急性阿米巴痢疾的病原学方法有哪些？并阐述其注意事项。