下列禁忌作为器官移植的供者的是（） A.年龄50岁 B.患脑原发性恶性肿瘤 C.HI

一试剂瓶中装有甲和乙两种物质的混合物，已知甲和乙的某些性质如下表：

物质	化学式	熔点：℃	沸点：℃	密度：g·cm-3	溶解性
甲	C3H6O2	-98	47.5	0.93	溶于水和有机溶剂
乙	C4H8O2	-84	77	0.90	溶于水和有机溶剂

据此，将甲和乙互相分离的最佳方法是

A. 萃取        B. 过滤       C. 蒸馏           D. 洗气

阅读理解

     Several years ago, I had a huge falling out with one of my best friends. So huge, in fact, that now I

can't even remember what happened.

     In the past nine years, I've seen her twice, and each time we've been polite but distant. And that

troubles me because we were once close friends. I'd like nothing more than to go back nine years, and

continue our friendship. But how? How do you reconnect with friends you've lost throughout the years?

     Linking to your past

    The desire to reconnect with lost friends isn't unusual. Why? Because friends link us to the past.

"Friends from years ago are custodians(监护人)of our past," says Sandy Sheehy, author of Connecting: The Enduring Power of Female Friendship.

    Although you can share information about your past with friends you've met recently, you don't have

a shared history with them. So you wind up only telling them about your past, rather than sharing it with

them.

    But many people never try to reconnect. Women especially have trouble taking that first step. Shynes

s or fear that the other person doesn't want to reconnect often stops many women. And that shouldn't

be. Your friends probably want to be in touch with you as much as you want to be in touch with them.

     Searching for friends

     Fortunately, finding lost friends isn't as difficult as it once was, thanks to tools like the Internet. Our

experts offer these suggestions for locating contact information:

    ＊Search Internet sites designed to locate people like classmates.com and switchboard.com.

    ＊Contact your high school or college alumni(校友)office to request current address information.

    ＊Surf online yellow pages. Check current phone records from your friend's hometown.

    ＊Network with other friends who might have known your friend.

    ＊Get in touch with any of her relatives, if you know where they live. If you know where she works,

find the company's web site and search the directory of personnel.

1. What is the subject discussed in the passage?

A.How to make new friends.

B.How to rediscover friendships.

C.How to develop healthy friendships.

D.How to keep in touch with friends.

2. The underlined sentence "friends from years ago are custodians of our past" means ____________.

A..many years ago old friends kept something for us

B.in the past old friends took care of us

C.old friends are part of our life history

D.old friends know what wrong things we did in the past

3. According to the passage what makes us reluctant to reconnect old friends?

A. Lack of money.

B. Shortage of time.

C. Regret and shame.

D. Fear and shyness.

4. How can we make contact with the lost friends according to the passage?

A. By asking other friends of the information on your lost friends.

B. By going direct to the place where he works.

C.By asking the local post office about your friends' new address.

D. By putting an advertisement in your friends' local town.

哪一种植物可以吸收二氧化硫？（）

A.月季

B.牡丹

C.夹竹桃

D.白玉兰

下列关于登高焊割作业的安全措施，哪些是正确的（）

A.登高焊割作业所使用的工具、焊条等物品应装在工具袋内，防止操作时落下伤人

B.不得在高处向下抛掷材料、物件或焊条头，以免砸伤、烫伤地面工作人员

C.禁止把焊接电缆、气体胶管及钢丝绳等混绞在一起，或缠在焊工身上操作

D.登高焊割作业应使用带有高频振荡器的焊接设备

E.登高焊割作业结束后，必须仔细检查工作地及下方地面是否留有火种，确认无隐患后，方可离开现场

中国文化遗产的标志是太阳鸟金箔，中国旅游的标志是（）。