生石灰可作食品包装袋内的干燥剂，其干燥的原理是什么（用化学方程式表示）_____

（10分）在某有机物A的分子的结构简式如右图。

(1) A中具有            、              官能团

（写官能团名称）

（2）A跟NaOH溶液反应的化学方程式是

（3）A跟NaHCO₃溶液反应的化学方程式是

（4）A在一定条件下与乙醇反应的化学方程式是

Never give out identifying information such as Name, Home Address, School name, or Telephone Number in a public message such as at a chat room or on bulletin bards. Never send a person a picture of you without first checking with your parents or guardian.

● Never respond to messages or bulletin board items that are: Suggestive / Obscene / Belligerent / Threatening / Make You Feel Uncomfortable.

● Be careful when someone offers you something for nothing, such as gifts and money. Be very careful about any offers that involve your coming to a meeting or having someone visit your house.

● Tell your parents or guardian right away if you come across any information that makes you feel uncomfortable.

● Never arrange a face-to-face meeting without telling your parents or guardian. If your parents or guardian agree to the meeting, make sure that you meet in a public place and have a parent or guardian with you.

● Remember that people online may not be who they seem. Because you can’t see or even hear the person, it would be easy for someone to misrepresent him or herself. Thus, someone indicating that“she”is a“12-year-old-girl”could in reality be an older man.

● Be sure that you are dealing with someone that you and your parents know and trust before giving out any personal information about yourself via E-mail.

● Get to know your“online friends”just as you get to know all of your other friends.

小题1:We can infer from the passage that            .

A．it is not safe to surf the internet

B．people now are no longer honest

C．we can chat with unfamiliar people online

D．people online are not who they are小题2:Which of the following is right according to the passage?

A．People online never tell their friends their real names.

B．You can often get something free from the internet.

C．Your friends online may want to meet you.

D．Online friends are not friends at all.小题3:What is the main idea of the passage?

A．How to surf the internet.

B．Kids shouldn’t surf the internet.

C．How to choose online friends.

D．How to protect yourselves online.

亲爱的弟兄啊，你们却要在至圣的真道上造就自己，在圣灵里祷告，保守自己常在神的爱中，仰望我们主耶稣基督的怜悯，直到永生。出自：（）

A、犹大书20――21；

B、罗马书；

C、启示录。

患者，女，18岁，面部检查，无明显的异常，覆10mm，覆盖2mm，上颌和下颌开，四个第一磨牙轻度Ⅲ类咬合关系，牙弓无拥挤，FMA42°下颌角141．5°，下颌支高度偏短。四个第一磨牙牙胚存在。有吮指习惯。

如不进行正颌外科治疗，欲使用正畸牙齿移动达到治疗目的，需如何进行拔牙设计（）

A.拔除四个第一前磨牙

B.拔除上颌两个第一前磨牙和下颌两个第二前磨牙

C.拔除下颌两个第一前磨牙和上颌两个第二前磨牙

D.拔除上颌两个第一前磨牙和下颌两个第三磨牙

E.不拔牙

苦杏仁的炮制条件是（）

A.15倍沸水加热2分钟

B.5倍沸水加热10分钟

C.10倍冷水加热5分钟

D.10倍沸水加热10分钟

E.10倍沸水热5分钟