不但对高大模板扣件式钢管支撑体系施工安全管理作出过规定，还于2013年颁布了《扣件式

在证券组合管理中，投资目标是指投资者在承担一定风险的前提下，期望获得的投资收益率。（）

胰岛素依赖型糖尿病，合用口服降糖药时，最好选用（）。

A.优降糖

B.甲苯磺丁脲

C.氯磺丙脲

D.乙酰磺环己脲

E.降糖片

“嫦娥一号”的成功发射，使全国 人民欢欣鼓舞。请同学们阅读下列航天 技术中的化学短文并回答有关问题。 材料一 2007年10月24日19时10分，“嫦娥一号”卫星发射成功。下图是中国 月球探测工程标志图案，它以中国书法， 抽象地勾勒出一轮圆月，一双脚印踏在其上，象征着月球探测的终极梦想。此作品对中国的意味十足，简洁而明朗，体现了传统和现代的完美结合。

材料二 人类要在月球生活居住，首先离不开淡水和氧气，而月球上既没有水又没有空气。科学家发现月球的沙土中含有丰富的含氧钛铁矿，成分为TiO₂、Fe₂O₃的混合物，将这些矿石利用CO 来还原提炼单质钛和铁，若用氢气还原，可以得到淡水。将这些矿石通电，还可以从中分离出氧气。

(1)月球土壤中存在天然的铁、金、银、铅等多种金属矿物颗粒。若从铁、金( Au)、银、铅(Pb)混合金属中回收某些金属，将混合金属放入足量的盐酸中充分反应，然后过滤， 剩余的固体中可能回收得到的金属组合是(      )。

A．Fe、Pb B．Au、Fe C．Ag、Au D．Pb、Ag

(2)“嫦娥一号”发射的火箭推进器中装有液态肼（用A表 示）和过氧化氢(H₂O₂)，它们混合时的反应方程式为： 2H₂O₂+A==N₂ +4H₂O，则肼(A)的化学式为(      )。

A．N₂H₂ B．N₂H₄O₂ C．NH₂ D．N₂H₄

(3)从铁生锈条件来分析，月球上铁制品__________（填“易”或“不易”）生锈。

(4)现利用CO来还原TiO₂、Fe₂O₃的混合物提炼单质钛和铁，装置如下图所示，试回答：

①写出A中发生反应的化学方程式（任意一个）____________ 。

②用CO还原钛铁矿，生成钛和铁的混合物，可用简单的物理方法将两种物质分开___________。

③就实验操作顺序的问题两位同学出现了分歧。小月认为先通一段时间CO排空气，然后再点燃C和A中的酒精灯，小亮认为这样做不好，他的理由是___________ ；小亮认为先点燃C和A中的酒精灯，然后再通CO，小月又提出反对，她的理由是 ____________；老师认为他们的反对意见都有一定道理。请你帮助这两位同学解决他们的困难，你的办法是____________ 。

下列关于项目式组织形式的叙述正确的是( )。

A．这是介于职能式与矩阵式组织结构之间的一种项目管理组织模式

B．适用于工作周期长、专业复杂或比较特殊的项目及投资或工程量较大的项目

C．项目团队内部不易沟通

D．项目管理层次相对复杂，影响项目管理决策速度

E．项目经理是真正意义上的负责人

阅读理解。

      I recently turned fifty, which is young for a tree, midlife for an elephant, and ancient for a

sportsman Fifty is a nice number for the states in the US or for a national speed limit, but it is

not a number that I was prepared to have hung on me. Fifty is supposed to be my father's age,

but now I am stuck with this number and everything it means.

      A few days ago, a friend tried to cheer me up by saying, "Fifty is what forty used to be. "He

had made an inspirational point. Am I over the hill? People keep telling me that the hill has been

moved, and I keep telling them that the high-jump bar has dropped from the six feet I once easily

cleared to the four feet that is impossible for me now.

     "You're not getting older, you're getting better, "says Dr. Joyce Brothers. This, however, is the

kind of doctor who inspires a second opinion.

       And so, as I approach the day when I cannot even jump over the tennis net,l am moved to

share some thoughts on aging with you. I am moved to show how aging feels to me physically and

mentally. Getting older, of course, is obviously a better change than the one that brings you eulogies

(悼词). In fact,a poet named Robert

Browning considered it the best change of all:

                       Grow old along with me!

                        The best is yet to be.

      whether or not Browning was right, most of my first fifty years have been golden ones, so I will

settle for what is ahead being as good as what has gone by. I find myself moving toward what is ahead

with a curious blend (混合) of both fighting and accepting my aging, hoping that the philosopher (哲学家) was right when he said, "Old is always fifteen years from now. "

1. When the author turned fifty, people  around him_________.        

A. tried to comfort him

B. got inspirations from him

C. were friendlier with him

D. found him more talkative

2. The author considers his fifty years of life__________.     

A. peaceful                              

B. ordinary

C. satisfactory                        

D. regretful

3. We can infer from the passage that__________.  

A. the old should lead a simple life

B. the old should face the fact of aging

C. the old should take more exercise

D. the old should fill themselves with curiosity