下泌 * * 感染的治疗首选（） A.氨苄西林 B.复方磺胺甲噁唑 C.庆大霉素 D.头孢

完形填空。
The poor are very wonderful people. One evening my sisters and I went out and picked up four people from the street. One of them   1   a most terrible condition. I told my sisters,"You    2   the other three．I take care of this one who looks   3   ."So I did for her all that my love can do．I   4   her in bed, and there was such a beautiful smile on her face. She took hold of my hand as she   5    " Thank you"and then she died. I could not help but examined my heart before her. I asked myself   6   would say if I Was in her place．My answer was very simple．I would say I was hungry, cold, homeless, and I was dying, or something else, but she gave me her   7   love. Then she died with a smile on her face． 　　I am going to try to make a home for many people who have no home. Because I believe that love begins at home, and if we can create a home for the poor, I think that   8   love will spread. Through this love we will be able to bring peace to the pooh So let us always meet   9     with a smile, for the smile is the  10  of love, and once we begin to love each other naturally, we will do something for others.
( )1. A. were in ( )2. A. look for ( )3. A. worse ( )4. A. gave ( )5. A. spoke ( )6. A. which ( )7. A. grateful   ( )8. A. less and less ( )9. A. the others ( )10. A. begin	B. was in           B. care about       B. stronger         B. threw             B. told             B. what             B. careful         B. little and little B. the other  B. beginning	C. were with     C. catch up with C. better       C. put    C. said         C. when         C. hopeful       C. more and more C. another       C. end	D. was with       D. care for       D. healthier       D. pushed     D. shouted         D. how             D. powerful       D. fewer and fewer D. each other     D. ending

把一根火柴梗插在酒精灯的灯焰内，待约1s后取出，可以观察到火柴梗最先碳化的部分是在灯焰的（　　）

A．外焰

B．内焰

C．焰心

D．中上部

“神舟七号”载人飞船所用的固体燃料是铝粉和高氯酸铵的混合物．发射时，点燃铝粉产生大量的热引发高氯酸铵发生如下反应：2NH₄ClO₄

高温  .

N₂↑+2O₂↑+Cl₂↑+4X；则X的化学式为______．

下列哪种物品可以带入井下（）。

A．烟草

B．化纤衣服

C．棉织品

D．电炉

体内合成胆碱和乙醇胺的原料是

A．Met
B．SAM
C．Ser
D．Gly