抗微生物药物联合应用的指征是() A.病因未明的严重感染 B.单一抗微生物药不能控制

地球绕______不停的旋转叫做地球的自转，自转的方向是______，自转一周的时间是______，自转使地球表面产生了______现象和时差．

依据《国务院关于预防煤矿生产安全事故的特别规定》，被责令停产整顿的煤矿应当制订整改方案，落实整改措施和安全技术规定；整改结束后要求恢复生产的，应当由 ( )自收到恢复生产申请之日起60日内组织验收完毕。

A．国家煤矿安全监察机构

B．县级以上地方人民政府负责煤矿安全生产监督管理的部门

C．设区的市以上地方人民政府负责煤矿安全生产监督管理的部门

D．省级人民政府安全生产监督管理部门

I remember my math teacher Mr. Young very well. He stood out because the kids made fun d him. He was missing one of his fingers, and always pointed at students with his middle finger.

I was not very good at English and math. No matter how hard I tried, I just could not figure out why I did not understand what all the other kids found so easy to learn.

One day, I was told that if I got one more E on my report card, I would be taken to the “big person for kids”

I tried really hard for weeks. I just couldn't understand how to make different parts of members into whole things.

The day before report cards were to come out, 1 knew that Mr. Young would give me an E, just like he always did.

I went to Mr Young and told him that the orphanage (孤儿院) was going to send me to the big person if I got another E on my report card. He told me there was nothing he could do; it would be unfair to the other kids if he gave me a better grade than I had actually earned.

I smiled at him and said, "Mr. Young, do you know how the kids make fun of you because you’re missing your finger?" He looked at me, moved his mouth to one side and said nothing.

“They shouldn’t do that to you because you can't help having a finger, Mr. Young. Just like I can’t help not being able to learn numbers and stuff like that.” I said

The next day, when I got my report card, I tucked it into one of my books. While on the school bus, I opened it: Geography, B+; Mechanical Drawing, C-; English, D-l; History, C-; Gym, B+; Art, C; Math, D-.

That math grade was the most favorite one I ever received. Because I knew that someone in the world finally understood what it was like for me to be missing a finger inside my head.

59. From the second paragraph we can infer that the boy is _________ in some subjects.

A. mind-blowing (给人印象极深的 )         B. slow-witted (头脑迟钝的)

C. fun-loving                                     D. badly- behaved

60. Where may the boy live according to the passage?

A. In an orphanage.                                         B. In a big prison.        

C. In the school dormitory.                               D. In his home.

61. What grade should the boy have got in the math test this time?

A. D-.                  B. B +               C. D.                     D. E.

62. The underlined word "tucked" in the passage most probably means “________”.

A. stuck             B. listed               C. hid                   D. copied

63. The reason why the boy remembers Mr Young is that ________.

A. he missed one of his fingers                      B. he treated his students very well

C. he understood the boy                   D. he taught his students in a special way

已知Zn²⁺的4s轨道和4p轨道可以形成sp³型杂化轨道，那么[ZnCl₄]^2—的空间构型为(       )

A．直线型

B．平面正方形

C．正四面体型

D．正八面体型

阅读以下文字，完成下面问题。 按照计划，到2000年时，陆基卫星发射器将把三个“太空帆船”送入轨道，这些太空帆船在轨道上“扬起帆”并只依靠阳光作动力朝着月球方向航行。 太阳帆是靠光子在帆的发光表面反弹所产生的力推动的。在地球表面，这种推力作用很小，但在太空中，在一个巨形帆上能产生足够的前进推力。 一个剑桥科学家小组在建造欧洲参赛太阳帆船的挑战中因为设计独特而处于领先地位；它设计的太阳帆船将在竞赛中同其他太阳帆船一道，在一个载荷舱中由一个卫星发射器(如欧洲阿丽亚娜火箭)送入大约17公里高的轨道上。进入轨道后，它将展开成为3万平方英尺的帆，并环绕地球许多圈，速度逐渐增加，直到达到摆脱地球引力并进入月球轨道的速度。 太阳帆船可以用同风筝相似的方式来通过改变形状(从锥体到平板甚至是马鞍形)而加以操纵。与雨伞的脊相似的灵活的金属脊决定着帆船的形状，而且根据地面指令，金属脊还能受热致弯，从而改变帆船的形状，使帆船的某些部位接受更多的光照，以便让某一侧获得更大冲量并改变航行的方向。成功的关键是位于帆船中部的一颗小型太阳能通信卫星。该卫星为地面的导航人员提供视频图象，帆船的计算机控制系统就安置在卫星内。

光子反弹力能推动太阳帆船前进有一定的条件，下面不属于这些条件的一项是（）。

A．在太空中

B．帆用反光材料制造

C．太阳帆面积巨大

D．天气晴好，阳光充足