下列药剂属于均相液体药剂的是 A．溶胶剂 B．普通乳剂 C．纳米乳剂 D．混悬剂

保险代理从业人员在向客户宣传解释保险时，必须向客户交代清楚（）。

A.保险责任

B.按期交费

C.被保险人利益

D.重要条款内容

阅读理解。

     Last weekend, 20 000 people gathered in the state of Georgia to watch students from 28 countries

compete with robots they built. More than ten thousand students and more than five hundred robots took

part in the competition.

     The students and their robots competed at the FIRST Championship at the Georgia Dome in Atlanta.

FIRST is the short way of saying the organization's complete name: For Inspiration and Recognition of

Science and Technology.

     Almost 1 700 high school teams entered a level of competition called LUNACY.

     In January, the organization sent supplies for robots to each team. The teams had six weeks to build

robots that could compete in the LUNACY game. The playing area had six robots, three on each team.

Each robot had another vehicle, or trailer (拖车), connected to it. The robots had to pick up large balls

and throw them into the trailers of opposing robots. The robots were moving on a surface where they

could slide. An alliance (联盟) of teams from California, Illinois and Michigan won the LUNACY

competition.

     A second competition involved building a robot that could travel on uneven surfaces, move objects

with unusual shapes and resist physical stress. Another competition was for younger students, aged 9

to 14. They had to design, build and program robots to explore the Earth's climate.

     American inventor Dean Kamen started FIRST in 1989. The organization holds robotics competitions

around the world. It offers programs that help young people learn more about science, technology,

engineering and mathematics, while building life skills. Many companies provide support to the organization.

     Mister Kamen says the goal is about more than building robots. He says the student competitors showed

they could deal with difficult technological problems. And, he says that is good news because the world

needs creative thinkers to help with increasingly complex (复杂) problems in the future.

1. The Robot Competition was organized by _____.

A. the State of Georgia

B. an organization named FIRST

C. American inventor Dean Kamen

D. some companies from California

2. The robots in the LUNACY game are able to _____.

A. travel on uneven surfaces

B. explore the Earth's climate

C. throw balls into the trailers

D. move objects with different shapes

3. The main purpose of FIRST is to _____.

A. attract more companies to support them

B. help students under 8 to be interested in science

C. teach students how to build the robots on the spot

D. help young people learn science as well as life skills

4. The underlined word "that" in the last paragraph refers to _____.

A. the goal of building robots

B. the students' ability to deal with problems

C. the goal of the student competitors

D. something about technological problems

（12分）在450℃并有催化剂存在下，于一容积恒定的密闭容器内进行下列反应：

2SO₂(g)＋O₂(g)2SO₃(g)   △H＝―190 kJ·mol^—1

⑴该反应500℃时的平衡常数________450℃时的平衡常数（填“＞”、“＜”或“＝”）。

⑵判断该反应达到平衡状态的标志是_______________。（填字母）

a．SO₂和SO₃浓度相等                b．SO₂百分含量保持不变

c．容器中气体的压强不变              d．v(O₂)_正＝2v(SO₃)_逆

e．容器中混合气体的密度保持不变

⑶欲提高SO₂的转化率，下列措施可行的是_______________。（填字母）

a．向装置中再充入N₂                 b．向装置中再充入O₂

c．改变反应的催化剂                  d．升高温度

⑷在一个固定容积为5 L的密闭容器中充入0.20 mol SO₂和0.10 mol O₂，半分钟后达到平衡，测得容器中含SO₃ 0.18 mol；若继续通入0.20 mol SO₂和0.10 mol O₂，则平衡_________________移动（填“向正反应方向”、“向逆反应方向”或“不”），再次达到平衡后，______ mol＜n(SO₃)＜______mol。

人体内的铁主要以还原铁的形式存在，少数食物中为三价铁。

GTO与可控硅的主要区别是（）

A.GTO没有控制极

B.可控硅电流大

C.可控硅在没导通前，控制极不起作用

D.GTO为可关断的可控硅