实验小学去年在校学生数是（3750）人．______．

—Did your sister get the position offered by the company?

—She failed in the job interview and is now in low spirits.

—I’m sorry for her.

—       .

A．Thank you

B．You’re welcome

C．I would think so

D．Never mind

6月5日为世界环境日，联合国环境规划署将2013年世界环境日的主题确定为：

Think.Eat.Save.——思前、食后、厉行节约。今年西安市(34°15′N,180°55′E)确定的“六·五”世界环境日主题是“治污减霾共同行动”，旨在传递“提升水气环境质量，人人共享，人人有责”的信息，倡导全体市民积极投身治污减霾环境治理活动中来。围绕“同呼吸，共奋斗”这一主题把世界环境日宣传活动当作全年环境保护宣传教育工作的主要阵地。结合所学知识，完成下列问题。

(1)为使太阳能热水器有最好的效果，需经常调节支架，使正午太阳光线直射集热板。在一年中，西安市的太阳能热水器的集热板与楼顶夹角的最大值为多少？最小值为多少？变动幅度大约是多大？

(2)描述环境日过后的几天，西安市昼夜长短状况及变化特点。

Global warming is causing more than 300,000 deaths and about $125 billion in economic losses each year, according to a report by the Global Humanitarian Forum, an organization led by Annan, the former United Nations secretary general.

The report, to be released Friday, analyzed data and existing studies of health, disaster, population and economic trends. It found that human-influenced climate change was raising the global death rates from illnesses including malnutrition (营养不良) and heat-related health problems.

But even before its release, the report drew criticism from some experts on climate and risk, who questioned its methods and conclusions.

Along with the deaths, the report said that the lives of 325 million people, primarily in poor countries, were being seriously affected by climate change. It projected that the number would double by 2030.

Roger Pielke Jr., a political scientist at the University of Colorado, Boulder, who studies disaster trends, said the Forum’s report was “a methodological embarrassment” because there was no way to distinguish deaths or economic losses related to human-driven global warming amid the much larger losses resulting from the growth in populations and economic development in vulnerable (易受伤害的) regions. Dr. Pielke said that “climate change is an important problem requiring our utmost (极度的) attention.” But the report, he said, “will harm the cause for action on both climate change and disasters because it is so deeply flawed (有瑕疵的).”

However, Soren Andreasen, a social scientist at Dalberg Global Development Partners who supervised the writing of the report, defended it, saying that it was clear that the numbers were rough estimates. He said the report was aimed at world leaders, who will meet in Copenhagen in December to negotiate a new international climate treaty.

In a press release describing the report, Mr. Annan stressed the need for the negotiations to focus on increasing the flow of money from rich to poor regions to help reduce their vulnerability(弱点) to climate hazards(危害)while still curbing (限制) the emissions of the heat-trapping gases. More than 90% of the human and economic losses from climate change are occurring in poor countries, according to the report.

小题1:What is the finding of the Global Humanitarian Forum?

A．Global temperatures affect the rate of economic development.

B．Rates of death from illnesses have risen due to global warming.

C．Malnutrition has caused serious health problems in poor countries.

D．Economic trends have to do with population and natural disasters.小题2:  What do we learn about the Forum’s report from the passage?

A．It was challenged by some climate and risk experts.

B．It aroused a lot of interest in the scientific circles.

C．It was warmly received by environmentalists.

D．It caused a big stir in developing countries.小题3: What does Dr. Pielke say about the Forum’s report?

A．Its statistics look embarrassing.

B．It is invalid in terms of methodology.

C．It deserves our closest attention.

D．Its conclusion is purposely exaggerated.小题4:  What is Soren Andreasen’s view of the report?

A．Its conclusions are based on carefully collected data.

B．It is vulnerable to criticism if the statistics are closely examined.

C．It will give rise to heated discussions at the Copenhagen conference.

D．Its rough estimates are meant to draw the attention of world leaders.小题5:  What does Kofi Annan say should be the focus of the Copenhagen conference?

A．How rich and poor regions can share responsibility in curbing global warming.

B．How human and economic losses from climate change can be reduced.

C．How emissions of heat-trapping gases can be reduced on a global scale.

D．How rich countries can better help poor regions reduce climate hazards.

直径25mm与50mm的两个园棒，通以相同的轴向电流进行磁化，园棒表面的磁感应强度将是Φ50mm的园棒较强

常用水泥中，具有干缩性较大特性的是( )水泥。

A．硅酸盐
B．普通
C．矿渣
D．粉煤灰