盘盈的存货应冲减当期的管理费用，而盘亏的存货计入当期管理费用。( )

探究光的折射规律

小明用激光棒、水槽、一个可转折的光屏探究光的折射规律．如图1

（1）在实验过程中，小明将有折射光线的半个光屏向后折转一个角度，是为了验证______，他将______（能或不能）看到折射光线，结论是______．

（2）图2是研究光的折射规律的实验原理图；下表中记录了不同的入射角和对应的折射角的实验测量数据．

入射角i	10°	20°	30°	40°	50°	60°	70°	80°
折射角γ	6.7°	13.3°	19.6°	25.2°	30.7°	35.1°	38.6°	40.6°

请你结合图，以光从空气进入到玻璃中的情况为例，分析实验数据（光从空气进入其它透明介质中也可得到具有相同规律的实验数据），对光从空气进入其它透明介质中的折射规律加以总结（补充完整）

a．折射光线跟入射光线和法线在同一平面内，并且分别位于法线两侧；

b．______．

请定量比较实验数据．把你新的发现写在下面：______．

男，45岁，眼睑上抬困难3个月，CT检查如图。最可能的CT诊断为()

A．畸胎瘤

B．神经纤维瘤

C．胸腺瘤

D．淋巴结增生

E．纵隔型肺癌

如图所示，足够长的光滑金属导轨固定在竖直平面内，匀强磁场垂直导轨所在的平面里．金属棒AC与导轨垂直且接触良好．现将导轨接上电阻R，导轨和金属棒的电阻忽略不计，则金属棒AC由静止释放后（　　） A．电流方向沿棒由C指向A B．金属棒所受安培力的最大值与其重力大小相等 C．在金属棒加速下落的过程中，金属棒减少的重力势能全部转化为在电阻上产生的热量 D．金属棒达到稳定速度后的下落过程中，金属棒的机械能守恒

阅读理解。

     BEIJING-Alarmed by the overreaching ambitions of many Chinese provinces to grow at all costs, China's

top economic chief is calling on officials to calm down and spare a thought for the environment.

     Zhang Ping, who heads China's National Development and Reform Commission, the central economic

planning agency, said only five or six of China's 30 provinces are targeting annual economic growth of 8 or

9 percent.

     The remaining provinces are aiming for growth rates of more than 10 percent this year, with some wanting

to double economic output in the coming five years.

     "China has a planned energy supply of about 4 billion cubic tons of coal equivalent (等量的) for the next

five years, and this is not enough to meet demands for economic growth to double," he was quoted as saying

on the news portal sina.com.

     Beijing is increasingly concerned with the ambitions of Chinese provinces across the country to chase high

growth despite the central government's urgent request for a more moderate and sustainable (可持续的) pace

of expansion.

     Years of rapid economic growth have taken a toll on China's environment, with Beijing trying to remove

some of the damage now. It has an annual growth target of 7 percent for the next five years, well down from

last year's 10 percent.

     Zhang said Beijing has asked local governments to take into account the supply of "energy, environment,

water and land" to set more reasonable growth targets.

1. Which of the following statements is True according to the passage?

A. The supply of the coal in China is not sufficient for the next five years.

B. Zhang Ping is an expert and economic chief from warty, sina.com.

C. Few Chinese provinces are aiming for economic growth rates of less than 10%.

D. Many Chinese provinces are alarmed by Beijing.

2. The underlined phrase "take a toll on" in the sixth paragraph means "_____".

A. improve

B. do damage to

C. restore

D. attach importance to

3. The general idea of the whole passage can be that _____.

A. China's economy is increasing at a fast speed

B. China's top chief lays more emphasis on the environment

C. economic high growth should go hand in hand with environmental concern

D. all Chinese provinces should slow down their economic growth rates

4. What could be the best title for the news?

A. Economic Development

B. Energy Supply

C. Environment

D. Sustainable Development

读某区域等高线示意图，回答下列各题。

图中河流的主汛期是当地的（）

A.春季

B.夏季

C.秋季

D.冬季