在锌湿法冶金中，预先将硫化锌精矿进行（）。A.高温熔炼 B.焙烧 C.烧结 D.氨浸

患者男，20岁，因“发热伴腹痛、腹泻3d”来诊。排粪10余次/d，初为稀粪，后为黏液脓血粪，伴里急后重。粪常规：RBC5~10/HP，WBC20~25/HP。

经喹诺酮类抗生素治疗2d，症状无好转，更换为头孢曲松钠治疗后症状逐渐好转。该患者应用喹诺酮类抗生素治疗无效的原因可能是（）

A.疗程不够

B.可能存在编码细菌DNA旋转酶的A或B亚单位基因发生突变

C.由耐药性质粒（R因子）所引起，使痢疾杆菌产生或加强破坏抗生素的酶系

D.庆大霉素修饰酶与AA（16）I共同作用导致耐药

E.合并败血症

某地上16层、地下1层的现浇钢筋混凝土框架-剪力墙办公楼，如图25-29（Z）所示。房屋高度为64.2m，该建筑地下室至地上第3层的层高均为4.5m，其余各层层高均为3.9m，质量和刚度沿高度分布比较均匀，丙类建筑，抗震设防烈度为7度，设计基本地震加速度为0.15g，设计地震分组为第一组，Ⅲ类场地，在规定的水平力作用下，结构底层框架部分承受的地震倾覆力矩大于结构总地震倾覆力矩的10%但不大于50%，地下1层顶板为上部结构的嵌固端。构件混凝土强度等级均为C40（f_c＝19.1N／mm²，f_t＝1.71N／mm²）。

假定，题25中剪力墙抗震等级为一级，地上第1层墙下端截面和上端截面考虑地震作用同一组合，但未按规范规程相关规定调整的弯矩计算值（kN·m）和剪力计算值（kN）分别为M^b＝1500、V^b＝260；M^t＝1150、V^t＝260；考虑地震作用组合并已按规范、规程调整的弯矩设计值（kN·m）和剪力计算值（kN）分别为M^b＝1500、V^b＝416；M^t＝1150、V^t＝416。剪力墙水平分布筋采用HRB335（f_yh＝300N／mm²）级钢筋。试问，按剪压比要求，剪力墙截面受剪承载力最大值V_w（kN）与下列何项数值最为接近（）。提示：h_w0＝2300mm，γ_RE＝0.85。

A.1900

B.2100

C.2500

D.2800

B

It was 1961 and I was in the fifth grade. My marks in school were miserable and, the thing was, I didn’t know enough to really care. My older bother and I lived with Mom in a dingy multi-family house in Detroit. We watched TV every night. The background noise of our lives was gunfire and horses’ hoofs from “Wagon Train” or “Cheyenne”, and laughter from “I Love Lucy”, or “Mister Ed”. After supper, we’d sprawl on Mon’s bed and stare for hours at the tube.

But one day Mom changed our world forever. She turned off the TV. Our mother had only been able to get through third grade. But, she was much brighter and smarter than we boys know at the time. She had noticed something in the suburban houses she cleaned books. So she came home one day, snapped off the TV, sat us down and explained that her sons were going to make something of themselves. “You boys are going to read two books every week,” she said. “And you’re going to write a report on what you read.”

We moaned and complained about how unfair it was. Besides, we didn’t have any books in the house other than Mom’s Bible. But she explained that we would go where the books were: “I’ll drive you to the library.”

So pretty soon there were these two peevish boys sitting in her white 1959 Oldsmobile on their way to Detroit Public Library. I wandered reluctantly among the children’s books. I loved animals, so when I saw some books that seemed to be about animals, I started leafing through them.

The first book I read clear through was Chip the Dam Builder. It was about beavers. For the first time in my life I was lost in another world. No television program had ever taken me so far away from my surroundings as did this verbal visit to a cold stream in a forest and these animals building a home.

It didn’t dawn on me at the time, but the experience was quite different from watching TV. There were images forming in my mind instead of before my eyes. And I could return to them again and again with the flip of a page.

Soon I began to look forward to visiting this hushed sanctuary form my other world. I moved from animals to plants, and then to rocks. Between the covers of all those books were whole worlds, and I was free to go anywhere in them. Along the way a funny thing happened: I started to know things. Teachers started to notice it too. I got to the point where I couldn’t wait to get home to my books.

Now my older brother is an engineer and I am chief of pediatric neurosurgery at John Hopkins Children’s Center in Baltimore. Sometimes I still can’t believe my life’s journey, from a failing and indifferent student in a Detroit public school to this position, which takes me all over the world to teach and perform critical surgery.

But I know when the journey began the day Mom snapped off the TV set and put us in her Oldsmobile for that drive to the library.

46. We can learn form the beginning of the passage that ___________.

A. the author and his brother had done well in school

B. the author had been very concerned about his school work

C. the author had spent much time watching TV after school

D. the author had realized how important schooling was

47. Which of the following is not true about the author’s family?

A. He came from a middle-class family.

B. He came from a single-parent family.

C. His mother worked as a cleaner.

D. His mother had received little education.

48. The mother was ____________ to make her two sons switch to reading books.

A. hesitant               B. unprepared        C. reluctant                   D. determined

49. How did the two boys feel about going to the library at first?

A. They were afraid                                    B. They were reluctant.

C. They were impatient.                               D. They were eager to go.

50. The author began to love books for the following reasons EXCEPT that ___________.

A. he began to see something in his mind

B. he could visualize what he read in his mind

C. he could go back to read the books again

D. he realized that books offered him new experience

阅读下文，完成以下问题。

我们要了解和评判一个作者，应该知道他那时代对于他那一类作品的意见，这些意见就是后世文艺批评史的材料，而在当时表示一种文艺风气。一个艺术家总在某些社会条件下创作，也总在某种文艺风气里创作。这个风气影响到他对题材、体裁、风格的去取，给予他以机会，同时也限制了他的范围。就是抗拒这个风气的人也受到它负面的支配，因为他不得不另出手眼来逃避或矫正他所厌恶的风气。正像列许登堡所说，模仿有正有负，亦步亦趋是模仿，“反其道而行也是模仿”；圣佩韦也说，尽管一个人要推开自己所处的时代，仍然免不了和它接触，而且接触得很着实。所以，风气是创作里的潜势力，是作品的背景， 而从作品本身不一定看得清楚。 我们阅读当时人所信奉的理论，看他们对具体作品的褒贬好恶，树立什么标准，提出什么要求，就容易了解作者周围的风气究竟是怎么一回事，好比从飞沙、麦浪波纹里看出了风的姿态。

一时期的风气经过长时期而能保持，没有根本的变动，那就是传统。传统有惰性，不肯变，而事物的演化又使它不得不以变应变，因此规律、习惯不断地相机破例，实际上作出种种妥协，来迁就事物的演变。它把规律解释得宽，可以收容新风气，免得因对抗而动摇地位。传统愈悠久，妥协愈悠久，妥协愈多，愈不肯变，变的需要就愈迫切，不再能委曲求全，于是旧传统和新风气破裂而被它破坏。新风气的代兴也常有一个相反相成的现象。它一方面强调自己是崭新的东西，和不相容的原有传统立异；而另一方面要表示自己大有来头，非同小可，向古代另找一个传统作为渊源所自。例如明、清的批注家要把《水浒》、《儒林外史》等白话小说和《史记》、《汉书》挂钩搭线，西方18世纪批评家也要把新兴的长篇散文小说遥承古希腊、罗马的史诗。这类暴发户造谱牒或者野孩子认父的事例，在文学史上常有；它会影响创作，使作品从自然的天真转而为自觉的有教养、有师承，所以未可忽视。

文中用“暴发户造谱牒”、“野孩子认父”作喻来说明（）。

A．新风气强调自己跟传统不能相容的现象。

B．新风气强调自己是崭新的东西的现象。

C．新风气希望从自然的天真转而为自觉的有教养的现象。

D．新风气向古代另找一个传统作为渊源的现象。

公元617年，（）杀了太守王仁恭，自称天子。