由于对学习活动的社会意义或个人前途等原因引发的学习动机称作( )。 A．远景的间接

我国所跨纬度从北纬4度到北纬53度，下列关于我国所处热量带的说法，正确的是（　　）

A．我国全部位于北温带

B．我国北部小部分属于北寒带

C．我国大部分地区属于热带

D．我国大部分地区处于北温带

（1）某实验小组用如图所示的装置测量弹簧的劲度系数k。当挂在弹簧下端的砝码处于静止状态时，测出弹簧受到的拉力F与对应的弹簧长度L（弹簧始终在弹性限度内），列表记录如下：

因为逐差法常用于处理自变量等间距变化的数据组，所以小组一成员用逐差法处理数据，具体如下：将表中第三列相邻的两项求差，得出弹簧伸长量ΔL= L_i - L_i-1

每个ΔL都是与相同的拉力ΔF=0.49N相对应的伸长量，求出ΔL的平均值

＝＝＝cm＝1.47cm

故该弹簧的劲度系数为k＝＝＝0.333N/cm

该成员在实验数据处理中存在的问题是：                                                ；

请你用逐差法处理表格中的数据，尽量精确计算出弹簧的劲度系数k=        N/cm（结果保留三位有效数字）。

（2）一微安表的刻度盘只标注了表示量程I_g =100μA的刻度线，尚未标注其他分刻度线，如图所示。请用下列全部器材测量微安表的内阻：

i、图示的待测微安表：内阻R_g约为2kΩ

ii、1块毫伏表：量程250mV，最小分度5mV，内阻约为1kΩ

iii、1个滑动变阻器R₁：0～50Ω

iv、1个滑动变阻器R₂：0～3kΩ

v、1个直流电源E：电动势E=1.5V，内阻r约为1Ω

vi、1个单刀单掷开关S，导线若干

①在方框内画出测量微安表的内阻R_g的实验电路原理图（原理图中的元件要用相应的英文字母标注）。

②下面是主要的实验操作步骤，将所缺的内容填写在横线上方：

第一步：断开S，按电路原理图连接器材，将两个滑动变阻器R₁、R₂的触头分别置于合理的位置；

第二步：闭合S，分别调节R₁和R₂至适当位置，                                            

③用已知量和测得量的符号表示微安表的内阻R_g=              

Over 1，400 university students from 37 countries and regions came to China for the 2008’s WorldMUN meeting（世界大学生模拟联合国大会）. The meeting was held in Peking University from January 5th to 11st, 2008.

The idea of the WorldMUN began in 1991. A group of students at Harvard（哈佛）University wanted to make a new meeting to bring together the students who were interested in the world. They wanted to discuss different problems around the world. The WorldMUN is based on understanding, compromise, learning and friendship. The first meeting was held in Poland in 1992. After that, it is held in spring every year. Last year, it was held in Scotland.

This was the first time the WorldMUN meeting was held in Asia. It was also the biggest one in history. The students came from the best universities around the world. During the five-day meeting, they did everything that people in the UN do. Though their skin colors and cultures were different, they had the same wish to make the world better.

1.The 2008’s WorldMUN meeting was held in   .

A. Scotland    B. Harvard University    C. Beijing University     D. Thailand

2.The word “compromise” in the passage means    in Chinese.

A. 友谊         B. 理解         C. 和解         D. 同情

3. Which of the following is NOT true?

A. The students want to travel around the world.

B. The students are interested in the world.

C. The students want to discuss different problems.

D. one world, one wish !

4.The best title of the passage is     .

A. The First WorldMUN Meeting     B. The WorldMUN Meeting

C. University Student               D. A warm welcome to Beijing

引起Ⅰ型呼吸衰竭最常见的疾病是（）

A.慢性支气管炎

B.阻塞性肺气肿

C.气管异物

D.膈肌麻痹

E.ARDS

( )的安排是车站提供给旅客安排出行的依据，也是车站完成旅客运输任务的一项重要的基础工作。

A．起讫站点
B．使用车型
C．客运班次
D．行车路线