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政府机构的主体是( )。

A．领导机构

B．办公、办事机构

C．职能机构

D．派出机构

亚硝酸盐对人体健康的危害越来越受到科学界的重视，亚硝酸钠是一种工业用盐，常作为冬季水泥施工的抗冻剂，但绝对不能食用，是一种有毒的致癌物质．然而，亚硝酸钠外形与食盐很相似，且有咸味，因此常被人误作为食盐使用，导致中毒事故的发生．  在某工地上，采购人员送来一袋外观酷似食盐的晶体物质．炊事员发现其外包装字迹模糊，无法辩认，难以确认是否为食盐．为了安全起见，炊事员向附近XX中学的化学老师求教．现在，请你根据该校化学老师所查到的如下资料，至少提出两种迅速、直观的检验方案，以辩认食盐的真伪．要求简要叙述鉴别方法、现象和结论．

项目	亚硝酸钠	氯化钠
化学式	NaNO2	NaCl
色、态	白色固体	白色固体
水溶性	易溶	易溶
熔点	271℃	801℃
热稳定性	320℃发生分解，放出有臭味气体	1423℃熔化
水溶液的酸碱性	呈碱性	呈中性
跟稀盐酸作用	放出红棕色气体	无反应

你设计的方案一：______

你设计的方案二：______．

某甲因做生意急需用钱，便用自己收藏多年的一件明朝瓷器作抵押，向朋友某乙借款 10万元，借款期为1年。鉴于双方之间的朋友关系，甲与乙仅仅订立了一份抵押协议，而没有去办理抵押登记。但就在抵押协议签订3个月后，甲又背着乙将该瓷器以 12万元的价格卖给了丙。那么，在借款到期后甲不能如期还款时，乙能否向丙要求就瓷器行使抵押权

A．能，因为甲与乙之间的抵押合同已生效

B．能，因为根据物权优先原则，乙在先发生的担保物权优于丙在后发生的受领保持权

C．不能，因为甲与乙没有去办理抵押登记，故不能对抗丙

D．不能，因为甲转让瓷器时没有经过乙的同意

完形填空。

As a child, there was nothing I liked better than Sunday afternoon at my grandfather's farm.   1   by miles of winding stone walls, the house provided   2   hours of fun for a city boy.       I can still remember one   3   when I was eight years old. I wanted   4   anything to be allowed to climb the walls surrounding the property. The walls were old; some stones were   5  , others loose. Still, my desire to climb across those walls   6   so strong that finally, one spring weekend, I took all my   7   and entered the living room, where the   8   had gathered after Sunday dinner.       "I, I wanna climb the stone walls," I said hesitantly.   9   a chorus went up from the women in the room. "Heavens, no!" they cried. "You will hurt yourself". I wasn't too  10 ; the respond was just as I had expected. But  11  I could have left the room, I was  12  by my grandfather's loud voice:" Now  13  just a minute." I heard him say. "Let the little boy climb the stone walls.  14 , he has to learn to do things for himself."       For the next two hours I climbed those old walls and had the time of my  15 . Later I told my grandfather about my  16 . I will never forget what he said:"Fred," he said, smiling, "you made this day a (an)  17  one just by being yourself. Always remember, there is only one person in this whole world like you, and I like you exactly as you are."       Many years have passed since then, and today I  18  the television program. Mister Rogers's Neighborhood, seen by millions of children. There have been  19  over the years, but one thing  20  the same: my suggestion to children at the end of almost every visit. "There is only one person in this whole world like you," the kids can hear me say, "and people can like you exactly as you are."

( )1. A. Covered    ( )2. A. meaningless  ( )3. A. morning    ( )4. A. more than   ( )5. A. remaining   ( )6. A. built     ( )7. A. trouble    ( )8. A. adults    ( )9. A. Quickly    ( )10. A. excited    ( )11. A. after     ( )12. A. encouraged    ( )13. A. keep up   ( )14. A. Anyhow   ( )15. A. childhood   ( )16. A. action    ( )17. A. special   ( )18. A. own      ( )19. A. jobs     ( )20. A. remains    B. Surrounded   B. short      B. afternoon    B. as well as    B. left        B. went      B. mind        B. relatives    B. Hurriedly    B.  sad        B. before     B. surprised   B. hold on     B. However    B. play        B. adventure    B. interesting        B. like      B. events     B. develops    C. Extended    C. endless      C. evening      C. rather than   C. tight         C. grew     C. courage      C. men         C. Frequently    C. disappointed   C. as         C. allowed      C. hold up      C. Therefore    C. life        C. pleasure      C. common          C. hold      C. adventures   C. becomes    D. Spread      D. imaginable    D. Sunday        D. other than    D. missing           D. turned    D. heart         D. women         D. Instantly      D. pleased        D. when        D. stopped       D. keep on       D. Nevertheless              D. Sunday        D. happiness     D. beautiful         D. host       D. changes      D. seems

汽车修理的原则是（）。

A.临时修理

B.预防修理

C.视情修理

D.强制修理