如图是双缝干涉实验装置，屏上O点到双缝S1、S2的距离相等．当用波长为0.75μ

甲公司于6月5日以传真方式向乙公司求购一台机床，要求立即回复。乙公司当日回复收到传真。6月10日，甲公司电话催问，乙公司表示同意按甲公司报价出售，并要求甲公司于6月15日来人签订合同书。6月15日，甲公司前往签约，乙公司要求加价，未获同意，乙公司遂拒绝签约。根据合同法律制度的规定，下列表述中，正确的是( )。

A．买卖合同于6月5日成立

B．买卖合同于6月10日成立

C．买卖合同于6月15日成立

D．甲公司有权要求乙公司承担缔约过失责任

实验室制取下列气体时，尾气的处理不正确的是（　　）

A．制时，可用NaOH溶液吸收

B．制时，可用水吸收

C．制CO时，可用点燃方法

D．制时，可用浓吸收

某氢化钾样品含有杂质氯化钙和氯化镁，实验室提纯流程如下：

①操作A的目的是使　 　，X溶液中溶质是　  　．

②过滤时用到的玻璃仪器有漏斗、　 　、　 　．实验过程中发现过滤速度较慢，可能的原因是固体颗粒阻碍了液体通过滤纸孔隙，还可能是　                　．

③本实验中蒸发是为了除去　 　（填化学式）．取所得KCl固体进行焰色反应，透过蓝色钴玻璃，观察到火焰呈　 　色．

④若样品中含80gKCl，理论上最终所得KCl固体的质量　 　（填编号）．

a．大于80g        b．等于80g        c．小于80g        d．无法确定．

阅读理解

     I am a good mother to three children.I have tried never to let my profession stand in the way of being

a good parent.

     I no longer consider myself the center of the universe.I show up.I listen.I try to laugh.I am a good

friend to my husband.I have tried to make marriage vows(誓约) mean what they say.I am a good friend

to my friends, and they to me.Without them, there would be nothing to say to you today.

     So here's what I want to tell you today:get a life.A real life, not a desire of the next promotion(提升),

the bigger paycheck and the larger house.

     Get a life in which you are not alone.Find people you love, and who love you.And remember that love

is not leisure(休闲) but work.Pick up the phone.Send an email.Write a letter.And realize that life is the

best thing and that you have no business taking it for granted.

     It is so easy to waste our lives, our days, our hours, and our minutes.It is so easy to exist instead of

living.I learned to live many years ago.Something really, really bad happened to me, something that

changed my life.If I had my choice, it would never have been changed at all.And what I learned from it is

what, today, seems to be the hardest lesson of all.

    I learned to love the journey, not the destination.I learned to look at all the good in the world and tried

to give some of it back because I believed in it, completely and totally.And I tried to do that, in part, by

telling others what I had learned.

    By telling them this:read in the backyard with the sun on your face.Learn to be happy.And think of life

as a deadly illness, because if you do, you will live with joy and passion(激情) as it ought to be lived.

1. The best title of this passage probably is "________".

A. Love Your Friends

B. Live a Real Life

C. Don't Waste Time

D. Be a Good Mother and Wife

2. How did the author form her view of life?

A. Through social experience.          

B. By learning from her friends.

C. Through an unfortunate experience.      

D. From her children and husband.

3. By the underlined sentence "It is so easy to exist instead of living." in the fifth paragraph, the author

really means that people tend to________.

A. make a living rather than live a real life    

B. work rather than enjoy life

C. waste a lot in life                      

D. forget the most important lesson in life

4. It can be inferred from the passage that________.

A. the author is a success in personal life

B. the author doesn't try her best to work well

C. the author spends all her time caring for her children

D. the author likes traveling very much

聚碳酸酯（）

A.药物储库

B.压敏胶

C.被衬层

D.控释膜

E.防黏材料