问题
单项选择题
肾小管对HCO3ˉ重吸收的叙述错误的是
A．主要在近球小管重吸收
D．与H+的分泌有关
C．以CO2的形式重吸收
D．需碳酸酐酶的参与
E．滞后于Cl-的重吸收
答案
参考答案：E
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肾小管对HCO3ˉ重吸收的叙述错误的是
A．主要在近球小管重吸收
D．与H+的分泌有关
C．以CO2的形式重吸收
D．需碳酸酐酶的参与
E．滞后于Cl-的重吸收
参考答案：E
| 完形填空。 | |||
 On my first job, I worked as a sports editor for a small newspaper. I never got a letter from my readers, so I was __1__ that there was an envelope on my desk one morning. From the __2__ , I could see it was from a most popular newspaper. When I opened it, I found a note and it read, "You did a good job. Go on!" The note was __3__ by Mr John, a famous sports editor. As I was a green hand (新手), his words made me __4__ After that, I kept the note in my desk drawer. Whenever I doubted __5__ I had the ability to be a good editor, I would read John's note and become __5__ again. Later, when I made friends with Mr John, the note writer, I learned that he often wrote notes to __6__ young people in many fields. "When I make __7__ feel happy," he told me, "I feel happy, too." __8__ , why are there few note writers like John in our life? In my __9__ , many people are afraid that they cannot be well understood. Also, writing takes more time and it is __10__ to pick up the phone. The problem with phone calls is that they cannot __11__ a long time, but a note is a good way of record and our words can be read __12__ . So, when you find some people around you need __13__ , please write a note of encouragement to bring them more confidence. Maybe, you are not sure what will __14__ , but remember Mr John's words: making others feel happy makes you happy, too. | |||
| ( ) 1. A. certain ( ) 2. A. calendar ( ) 3. A. signed ( ) 4. A. unhappy ( ) 5. A. why ( ) 6. A. serious ( ) 7. A. expect ( ) 8. A. other ( ) 9. A. But ( ) 10. A. opinion ( ) 11. A. stronger ( ) 12. A. wait ( ) 13. A. once ( ) 14. A. thanks ( ) 15. A. happen | B. sure B. envelope B. picked B. sleepy B. that B. confident B. describe B. the other B. However B. advice B. weaker B. last B. only once B. truth B. matter | C. surprised C. book C. copied C. excited C. what C. strict C. introduce C. others C. Therefore C. idea C. harder C. stop C. more than once C. trouble C. turn | D. frightened D. photo D. practised D. sad D. whether D. humorous D. encourage D. the others D. Actually D. decision D. easier D. rest D. less than once D. help D. hold |
（10分，每空2分）决定物质性质的重要因素是物质的结构。请回答下列问题：
(1)已知A和B为第三周期元素，其原子的第一至第四电离如下表所示：
| 电离能/kJ·mol－1 | I1 | I2 | I3 | I4 |
| A | 578 | 1 817 | 2 745 | 11 578 |
| B | 738 | 1 451 | 7 733 | 10 540 |
(2)已知：波长为300 nm的紫外光的光子所具有的能量约为399 kJ·mol－1。根据下表有关蛋白质分子中重要化学键的信息，说明人体长时间照射紫外光后皮肤易受伤害的原因：
。
| 共价键 | C—C | C—N | C—S |
| 键能/kJ·mol－1 | 347 | 305 | 259 |
(4)某配合物的分子结构如图所示，其分子内不含有__________(填字母)。
A．离子键 B．共价键
C．金属键 D．配位键 E．氢键