下列说法正确的是 A.人造纤维、合成纤维和光导纤维都是有机高分子化合物 B.煤经

题型:选择题

问题:

下列说法正确的是

A.人造纤维、合成纤维和光导纤维都是有机高分子化合物

B.煤经过气化、液化等物理变化可得到清洁燃料

C.煤的干馏、石油裂化、石油裂解都是化学变化

D.棉花、羊毛、蚕丝、麻都由C、H、O元素构成

考点:新型材料(新型陶瓷、单晶硅等)生活中的其他材料及应用(纳米材料、功能高分子材料等)
题型:选择题

在窗体上画一个命令按钮(其名称为Command1),然后编写如下事件过程: Private Shb Command1_Chck()Dim a(5,5) As IntegerDim i As Integer, j As IntegerFor i=1 To 3 For j=1 To 3a(i,j)=(i-1) * 3+jPrint a(i,j) Next j PrintNext i End Sub 程序运行后,单击命令按钮,在窗体上的输出结果是______。

A.1 4 7 2 5 8 3 6 9

B.1 2 3 4 5 6 7 8 9

C.1 2 3 4 5 6 7 8 9

D.没有输出

题型:选择题

建筑装饰涂料的辅助成膜物包括( )。

A.苯

B.丙酮

C.硫酸铁

D.铝、锰氧化物

E.硝酸纤维

题型:选择题

A few years ago, Paul Gerner began to gather a group of architects in Las Vegas to ask them what it would take to design a public school that used 50 percent less energy, cost much less to build and obviously improved student learning. “I think half of them fell off their chairs,” Gerner says.

Gerner manages school facilities (设施) for Clark County, Nevada, a district roughly the size of Massachusetts. By 2018, 143,000 additional students will enter the already crowded public-education system. Gerner needs 73 new schools to house them. Four architecture teams have nearly finished designing primary school prototypes (样品); they plan to construct their schools starting in 2009. The district will then assess how well the schools perform, and three winners will copy those designs in 50 to 70 new buildings.

Green schools are appearing all over, but in Clark County, which stands out for its vastness, such aggressive targets are difficult because design requirements like more natural light for students go against the realities of a desert climate. “One of the biggest challenges is getting the right site orientation (朝向),”Mark McGinty, a director at SH Architecture, says. His firm recently completed a high school in Las Vegas. “You have the same building, same set of windows, but if its orientation is incorrect and it faces the sun, it will be really expensive to cool.”

Surprisingly, the man responsible for one of the most progressive green-design competitions has doubts about ideas of eco-friendly buildings. “I don’t believe in the new green religion,” Gerner says. “Some of the building technologies that you get are impractical. I’m interested in those that work.” But he wouldn’t mind if some green features inspire students. He says he hopes to set up green energy systems that allow them to learn about the process of harvesting wind and solar power. “You never know what’s going to start the interest of a child to study math and science,” he says.

小题1:How did the architects react to Gerner’s design requirements?

A.They lost balance in excitement.

B.They showed strong disbelief.

C.They expressed little interest.

D.They burst into cheers.小题2:Which order of steps is followed in carrying out the project?

A.Assessment — Prototype — Design — Construction.

B.Assessment — Design — Prototype — Construction.

C.Design — Assessment — Prototype — Construction.

D.Design — Prototype — Assessment — Construction.小题3:What makes it difficult to build green schools in Clark County?

A.The large size.

B.Limited facilities.

C.The desert climate.

D.Poor natural resources.小题4:What does Gerner think of the ideas of green schools?

A.They are questionable.

B.They are out of date.

C.They are advanced.

D.They are practical.

题型:选择题

由于烃一水系统具有很高的汽液平衡常数值,因此说明水在油中的浓度不可能达到很低。

题型:选择题

关于外科手消毒操作流程,不正确的是()

A.清洗双手时,应清洁指甲下的污垢

B.整个手消毒过程中应保持手指朝下,让手的位置高于腰部

C.冲洗时避免水溅湿衣裤

D.清洗双手,手臂用软质的无菌刷手刷擦拭

E.刷手后的手臂、肘部如不慎触及他物,视为污染,必须重新刷洗

更多题库