The scarfher T-shirt.A. match B. looks g

有一两级除尘系统，设计风量为300000m³/h，烟气温度为140℃，当地大气压力为84.6kPa，重力除尘器入口含尘浓度为30g/m³，粉尘排放浓度为50mg/m³(标态)，问除尘系统应达到的除尘总效率是多少

A．99.83%
B．99.91%
C．99.89%
D．99.87%

填土在工程应用上正确的采用条件是（）。

A.堆填时间达5年的黏性土可作一般建筑物的天然地基

B.堆填时间达2年的粉土可作一般建筑物的天然地基

C.建筑垃圾组成的杂填土采用适当的措施处理后可作为一般建筑物的地基

D.以生活垃圾为主要成分的杂填土采用适当的措施处理后可作为一般建筑物的地基

同温同压下，在3支相同体积的试管中分别充有等体积混合的2种气体，它们是①NO和NO₂，②NO₂和

O₂，③NH₃和N₂。现将3支试管均倒置于水槽中，充分反应后，试管中剩余气体的体积分别为V1、V2、

V3，则下列关系正确的是[ ]

A．V1>V2>V3

B．V1>V3>V2

C．V2>V3>V1

D．V3>V1>V2

阅读理解。

     Today we tell about the expression "down to earth". Down to earth means being open and honest. It is

easy to deal with someone who is down to earth. Such people could be important members of society, but

they do not consider themselves to be better than others who are less important. They do not let their

importance "go to their heads." Someone who lets something go to his head feels he is better than others.

He has a "big head."

     A person who is filled with his own importance and pride is said to have "his nose in the air." Often the

person who has a big head and his nose in the air has no reason to feel better than others.

     Americans use another expression that is similar in some ways to down to earth-"both feet on the ground."

Someone with both feet on the ground is a person with a good understanding of reality. She has what is

called "common sense." She does not allow her dreams to block her understanding of what is real.

     The opposite kind of person is one who has his "head in the clouds. "Someone with his head in the clouds

is a person whose mind is not on what is happening in real life. Such a person may be called a"daydreamen."

     The person who is down to earth usually has both feet on the ground. But the opposite is not always true.

Someone with both feet on the ground may not be as open and easy to deal with as someone who is down

to earth.

     When we have both our feet firmly on the ground,and when we are down to earth,we do not have our

noses in the air. We act honestly and openly to others. And our lives are like the ground below up-solid and

strong.

1. He who considers himself to be better and more important than others is likely to _____. [ ]

A. have his head in the clouds

B. be easy to deal with

C. have a "common sense"

D. have "a big head"

2. Which of the following expressions is similar to "down to earth"? [ ]

A. "his nose in the air"

B. "go to his head"

C. "both feet on the ground"

D. "daydreamer"

3. The passage is mainly about _____. [ ]

A. some popular American expressions

B. how to be down to earth

C. why to be honest and open

D. how to deal with someone who is down to earth

下列属于违法分包的是（）。

A.总承包单位将建设工程分包给不具备相应资质条件的单位

B.建设工程总承包合同中未有约定，又未经建设单位认可，承包单位将其承包的部分建设工程交给其他单位完成

C.施工总承包单位将建设工程的主体结构的施工部分分包给其他单位

D.分包单位将其承包的建设工程再分包的

E.总承包单位将建设工程分包给具备相应资质条件的单位