下列关于物质的溶解性的叙述中，正确的是[ ] A.硝酸盐都能溶于水 B.碳酸盐都

完形填空。

I was filled with uncertainties and worries until my grandfather told me to stand all.      It was no   1   I wasn't looking forward to entering ninth grade. High school is well known for being a place for serious competitions, where everyone seems to be   2   physical changes and love self-esteem (自尊). For me,   3   was my greatest problem.      I had always felt no confidence and out of places as one of the taller members of my class, standing a head    4   the other girls. My grandfather would watch me grow   5   uncomfortable, but he didn't laugh at me or try to comfort me.   6  , he would give me advice. "Stand straight and tall," he'd say,   7   I unsuccessfully tried to make myself smaller and shorter. And each time, I would carefully   8   his words. As time   9 , I had changed the way I think about my life. His advice to me has become much more than a challenge to  10  my posture (压 力). It tells me to be proud of who I am.

( )l. A. wonder        ( )2. A. going through ( )3. A. shape         ( )4. A. of            ( )5. A. increasingly  ( )6. A. lnstead       ( )7. A. before        ( )8. A. listen to     ( )9. A. goes by       ( )lO. A. form         B. reason       B. starting with B. appearance   B. among        B. slowly       B. Therefore    B. when         B. understand        B. went by      B. build        C. guess     C. showing up                  C. height    C. above     C. greatly   C. Well      C. after     C. follow    C. passes    C. improve

某投资者上一交易日结算准备金余额为500000元，上一交易日交易保证金为116050元，当日交易保证金为166000元，当日平仓盈亏为30000元，当日持仓盈亏为-12000元，当日入金为100000元，该投资者当日结算准备金余额为（）元。（不计手续费等其他费用）

A.545060

B.532000

C.568050

D.657950

大多数的金属都能被拉成丝，打成片，这说明金属有较好的______．

（10分）以海水中常见物质A为原料可以发展很多种工业，下图中包含了中学课本中介绍的几种基本工业生产，请根据各物质之间的转化关系回答下列问题：

（1）电解A溶液反应的离子方程式为                                           ；

（2）写出C与D制取消毒剂的化学方程式                                        ；

（3）若要使工业合成J反应的平衡向生成J的方向移动，可采取的措施有           

A．升高温度             B．增大压强         C．使用催化剂       D．液化分离J

（4）将F和J通入A的饱和溶液中的顺序为            

A．先通入F后通入J      B．先通入J后通入F

C．同时通入             D．没有先后顺序要求

20090216

（5）图中所示工业制法获得的纯碱中常含有NaCl杂质，用下述方法可以测定样品中NaCl的质量分数。

则计算样品中NaCl的质量分数的数学表达式为：                                 

一个物体相对于另一个物体的位置改变叫做机械运动，它是绝对的，而静止是相对的，在有云的夜晚，我们抬头望月，觉得月亮在云中穿行，这时选取的参考系是（）

A.月亮

B.地面

C.云

D.星