（1 ）计算：配制100g溶质质量分数为5%的氯化钠溶液所需氯化钠5g．

（2 ）称量：用托盘天平称量所需的氯化钠时，发现托盘天平的指针偏向左盘，应____．

A．增加适量氯化钠固体     B．减少适量氯化钠固体

C．调节平衡螺母               D．向右盘加砝码

（3 ）量取：用量筒来量取所需的水，若仰视读数，则配制后溶液的质量分数会____．

（4 ）溶解：将氯化钠和水倒入烧杯中，溶解时玻璃棒搅拌的目的是____．

（5 ）转移到试剂瓶中贴好标签．

阅读课文《永久的悔》9～11段，回答小题。

    Around twenty years ago I was living in York. 1 I had a lot of experience and a Master's degree,I could not find 2 work.

    I was 3 a school bus to make ends meet and 4 with a friend of mine, for I had lost my flat. I had 5 five interviews(面试) with a company and one day between bus runs they called to say I did not 6 the job. “Why has my life become so  7？”I thought painfully.

    As I pulled the bus over to  8  a little girl, she handed me an earring  9 I should keep it  10  somebody claimed (认领) it. The earring was painted black and said “BE HAPPY”.

    At first I got angry. Then it  11 me—I had been giving all of my 12  to what was going wrong with my 13  rather than what was right！I decided then and there to make a 14 of fifty things I was happy with. Later, I decided to15 more things to the list.That night there was a phone call for  16  from a lady who was a director at a large  17.She asked me if I would  18  a one­day lecture on stress(压力) management to 200 medical workers. I said yes.

    My 19  there went very well, and before long I got a well­paid job.To this day I know it was because I changed my way of  20  that I completely changed my life.