下列哪些情形下用人单位可以招用未满16周岁的未成年人，并须报县级以上劳动行政部门批准

重50 N的物体，在粗糙水平面上向右运动，物体和水平面间的动摩擦因数μ=0.2,同时物体还受到一个大小为10 N、方向水平向左的拉力F作用，如图3所示，则水平面对物体的摩擦力的大小和方向是（   ）

图3

A．10 N，水平向左

B．20 N，水平向左

C．10 N，水平向右

D．20 N，水平向右

材料一：2010年3月28日是第四个“地球一小时”通过一小时熄灯行动促进节约能源和温室气体减排，宣传“地球一小时”我们有一个非常好的口号：‘熄灭的是灯光，点亮的是意识’。

材料二：中国政府11月25日提出了控制温室气体排放目标，到2020年，中国单位国内生产总值二氧化碳排放将比2005年下降40%至45%。这是中国按照国情的自愿行动，也是对全球应对气候转变的一大贡献。

材料三：气候变暖首先导致世界气候出现了严重的两极分化。联合国气候变化大会12月7日至18日召开，近200个国家和地区的代表聚会丹麦首都哥本哈根，商讨全球应对气候变化的道路。

阅读上述材料,运用所学知识,回答下列问题。

（1）“熄灭的是灯光，点亮的是意识”。你认为点亮的是一种什么样的意识？

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（2）从环境的重要性角度谈谈中国积极参加控制温室气体排放行动的理由。符合我国的哪些基本国策和发展战略？

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（3）控制温室气体排放目标是针对我国目前存在的哪些问题提出的？在减少温室气体排放方面我国有哪些可行性措施?

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（4）全球气候变暖属于哪一方面环境问题？联合国气候变化大会的召开体现了联合国哪一宗旨和可持续发展的什么原则？

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阅读理解

     However important school life may be, we can't ignore the fact that children spend more time at home

than in the classroom.Therefore the great influence of parents can't be ignored or discounted by the teacher. They can become strong supports of the school or they can consciously or unconsciously prevent the

school from accomplishing its aims.

     Administrators have been aware of the need to keep_parents_apprised_of the newer methods used in

schools.Many principals have conducted workshops explaining such matters as the reading readiness

program and developmental math.

     Moreover, the classroom teacher can also play an important role in explaining to parents what they

should do.The informal tea and many interviews carried on during the year, as well as new ways of

reporting pupils' progress, can significantly aid the interchange of ideas between school and home.

      Suppose that a father has been drilling Junior in arithmetic processes night after night. In a friendly

interview, the teacher can help the parent change his method.He might be persuaded to let Junior

participate in discussing the family budget, buying the food, using a measuring cup at home, setting the

clock, calculating mileage on a trip and engage in scores of other activities that have a mathematical basis.

     If the father follows the advice, it is reasonable to assume that he will soon realize his son is making

satisfactory progress in math and at the same time, enjoying the work.

     Too often, however, teachers' conferences with parents are devoted to unimportant accounts of

children' s wrongdoing, complaints about laziness and poor work habits, and suggestions for punishments

and rewards at home.

     What is needed is a more creative approach in which the teacher, as a professional advisor, plants

ideas in parents'minds for the best use of the many hours that the child spends out of the classroom.In

this way, the school and the home join forces in fostering the fullest development of youngsters'

competence.

1. The underlined phrase"keep parents apprised of"in Para.2 probably means to let parents________.

A. judge  

B. know

C. design  

D. develop

2. What is the purpose of the schools' informal tea and interviews?

A. To improve the relationship between teachers and parents.

B. To explain to parents the change of the school curriculum.

C. To report students' misdoings and suggestions for punishments.

D. To help develop good communication between school and home.

3. Why does the author provide the example in Paragraph 4?

A. To help parents know the importance of home activities.

B. To show how the teacher can guide in home training.

C. To prove parents are nonprofessional advisors.

D. To advice parents to teach kids math at home.

4. From the passage we learn that the author________.

A. thinks teachers should do better as professionals

B. is worried about children' s performance at home

C. is satisfied with the present state of school education

D. believes time spent out of the classroom has been wasted

一例用短效胰岛素治疗的糖尿病人，多次空腹血糖增高，尿糖阳性，白天尿糖全部阴性。

为确诊患者究竟夜间有无Somogyi现象，应做下列哪项检查（）

A.糖化血红蛋白

B.12点（半夜）后的尿糖

C.半夜12点后的血浆胰岛素水平

D.半夜10点后每2h查血糖1次，直到第2天早晨8点

E.半夜12点以后，每2h抽血查血浆皮质醇，高血糖素、生长激素及胰岛素、血糖水平

下列哪个不是经典自动控制理论常用的方法（）

A.反馈理论

B.特征方程

C.频率响应理论

D.根轨迹法