成蚊活动范围常取决于其（）、（）和（）的远近。

某宽厚板车间冷床区为三跨等高厂房，跨度均为35m：边列柱柱间距为10m，中列柱柱间距为20m，局部60m：采用三跨连续式焊接工字形屋面梁，其间距为10m，屋面梁与钢柱为固接。厂房屋面采用彩色压型钢板，屋面坡度为1/20：檩条采用多跨连续式H型钢檩条，其间距为5m：檩条与屋面梁搭接。屋面梁、檩条及屋面上弦水平支撑的局部布置示意如题图中的(a)图所示，且系杆仅与檩条相连。

中列柱柱顶设置有20m和60m跨度的托架，托架与钢柱采用铰接连接，托架的简图和荷载设计值如题图中的(b)和(c)图所示。屋面梁支承在托架竖杆的侧面，且屋面梁的顶面略高于托架顶面约150mm。

檩条、屋面梁、20m跨度托架采用Q235B钢，60m跨度托架采用Q345B钢。手工焊接时，分别采用E43型焊条和E50型焊条，要求焊缝质量等级为二级。

20m跨度托架杆件采用轧制T型钢，T型钢的翼缘板与托架平面相垂直。60m跨度托架杆件采用轧制H型钢，H型钢的腹板与托架平面相垂直。

60m跨度托架下弦杆最大轴心拉力设计值（kN）与下列（）项数值最为接近。

A．11969

B．8469

C．8270

D．8094

压力过滤罐反冲洗时（）要控制在设计范围之内。

A、反冲压力

B、反冲水量

C、反冲时间

D、反冲强度

The U.S. government has repeatedly made it clear that it would welcome China’s entrance into the world arena as a power. However, a series of issues since the beginning of this year, particularly Washington's stance on the U.S.-South Korean joint military exercises and the South China Sea issue, have made the world think: Is the United States ready to recognize China as a power on the world stage?

It is easier said than done for the United States to adapt itself to China's development. Lip service is far from enough to boost the development of Sino-U.S. relations. If Washington cannot find a way to recognize and accept China's peaceful rise onto the world stage, bilateral（双边的） ties will be like a roller coaster full of ups and downs. However, no one would like to see the negative effects rocky relations would bring to China, the United States and possibly to the world as a whole.

U.S. Secretary of State Hillary Clinton has urged China to play a greater role in solving the world's economic, environmental and political problems. She said global issues could not be solved by the United States or China alone, but without participation of the two countries, no problems would likely be solved. Washington has realized that the United States' global interest can be maintained only through changing the way it deals with China.

The Obama administration released positive signals in its relations with China, which have been interpreted as the United States showing its intention to change the traditional strategy of engagement and containment（遏制）. As a matter of fact, the general direction of Sino-U.S. relations provides a foundation on which the United States can base its foreign policies and is more complicated than an adjustment in real conditions. Issues such as arms sales to Taiwan, Google censorship, RMB exchange rates as well as finger-pointing about economic responsibility show Washington still seems confused and inpatient about relations with China.

The relationship between China and the United States is the most important and complicated bilateral relationship in the world this century. The development of Sino-U.S. relations will affect world peace and stability, especially in the Asia-Pacific region. Ian Bremmer, an American political scientist specializing in U.S. foreign policy, said, "America and China will have more than ever to gain from closer political and commercial ties, and must take steps to avoid a Cold War, or worse."

In that circumstance, the United States needs both wisdom and determination to recognize and accept China, a country that is totally different from its own, as a power on the world stage.

小题1:The underlined word stance in the first paragraph probably means      .

A．information

B．opinion

C．ignorance

D．criticism小题2:Why does the US have to change the way it deals with China?

A．The US welcomes Chin’s entrance into the world arena.

B．The US hopes that China will get more powerful.

C．Only in this way can China meet all of its demands.

D．Only in this way can its global interest be maintained.小题3:Ian Bremmer thinks both America and China will benefit more from      .

A．a cold war.

B．keeping patient

C．better cooperation

D．developing economy小题4:Which of the following might be the best title for the passage?

A．Is it Clear that China has become world power?

B．Is US ready to recognize China as world power?

C．Is US still the most powerful country in the world?

D．Is Sino-U.S. relationship the most important and complicated in the world.

吸收

在一个研究汽车尾灯用什么颜色能最快地引起后面车辆驾驶员反应的实验中，选取了8名被试在红光、绿光和黄光三种情况下测试他们的反应时。

如果要判断其反应快慢的差异是因为个体差异还是因为不同颜色所致，应该采用何种统计方法