确定子宫内膜癌的最可靠依据是A．症状 B．体征 C．宫颈刮片 D．分段诊断性刮宫组织

阅读理解。

     During the years after the terrorist attack on the World Trade Center, structural engineers have been

trying hard to solve a question that would otherwise have been completely unthinkable: Can building be

designed to stand catastrophic blasts (攻击) by terrorists?

     Soon after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo

and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) traveled to ground zero

as part of a project funded by the National Science Foundation. They spent two days beginning the task

of formulating (构思) ideas about how to design such structures and to search for clues on how to do so

in buildings that were damaged, but still are standing.

     "Our objective in visiting ground zero was to go and look at the buildings surrounding the World

Trade Center, those buildings that are still standing, but that sustained damage," said M. Bruneau, Ph.D. "Our immediate hope is that we can develop a better understanding as to why those buildings remain

standing, while our long-term goal is to see whether earthquake engineering technologies can be married

to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks,"

he added.

     Photographs taken by the investigators demonstrate the monumental damage to the World Trade

Center towers and buildings nearby. One building a block away from the towers remains standing, but

was badly damaged. "This building is many meters away from the World Trade Center and yet we see

a column (柱子) there that used to be part of that building," explained A. Whittaker, Ph.D. "The column

became a missile that shot across the road, through the window and through the floor."

     The visit to the area also brought some surprises, according to the engineers. For example, the floor

framing (框架) system in one of the buildings was quite strong , allowing floors that were pierced by tons

of falling debris (残砾) to survive. "Good framing systems may provide a simple, but reliable strategy for

blast resistance," he added. Other strategies may include providing alternate paths for gravity loads in the

event that a load-bearing column fails. "We also need a better understanding of the mechanism of collapse," said A. Whittaker. "We need to find out what causes a building to collapse and how you can predict

it."

     A. Reinhorn, Ph.D. noted that "earthquake shaking has led to the collapse of buildings in the past.

Solutions developed for earthquake-resistant design may apply to blast engineering and terrorist-resistant

design. Part of our mission now is to transfer these solutions and to develop new ones where none exist

at present."

1.The question raised in the first paragraph is one _____ .

A. that was asked by structural engineers a month ago

B. that is too difficult for structural engineers a month ago

C. that was never thought of before the terrorist attack

D. that terrorists are eager to find a solution to

2. The column mentioned by Dr. Whittaker _____ .

A. was part of the building close to the World Trade Center

B. was part of the World Trade Center

C. was shot through the window and the floor of the World Trade Center

D. damaged many buildings near the World Trade Center

3. A surprising discovery made by the investigators during their visit to ground zero is that _____.

A. floors in the faraway buildings remained undamaged

B. some floor framing systems demonstrate resistance to explosion

C. complex floor framing systems are more blast resistant

D. floors in one of the buildings were pierced by tons of debris

4. What Dr. Reinhorn said in the last paragraph may imply all the following EXCEPT that _____.

A. blast engineers should develop new solutions for terror-resistant design

B. blast engineering can borrow technologies developed for terror-resistant design

C. solutions developed for earthquake-resistant design may apply to terrorist-resistant design

D. blast engineering emerges as a totally new branch of science

（14分） 一固定的斜面，倾角为θ=45°，斜面长L=3．0m．在斜面的下端有一与斜面垂直的挡板。一质量为m的小滑块可视为质点，从斜面的最高点由静止下滑。滑块与挡板碰撞无机械能损失。滑块与斜面间的动摩擦因数为μ=0.20，求

（1）滑块与挡板第一次碰后沿斜面上升的最大距离？

（2）滑块运动的总路程？

以下不属于非法限制他人人身自由的选项有（）。

A、为索取合法债务而将他人扣押在单位的

B、为防止精神病患者行凶伤人而将其暂时隔离的

C、人民群众对正在实行犯罪或者犯罪后即时被发觉的犯罪嫌疑人、通缉在案的犯罪嫌疑人、越狱逃跑的罪犯或者正在被追捕的犯罪嫌疑人依法扭送到司法机关的

D、实行正当防卫而将犯罪嫌疑人暂时捆绑并押送司法机关的

是国家根本大法，具有最高法律效力，由全国人民代表大会行使修改和监督实施的职权，其常务委员会行使解释和监督实施的职权的是（）

A.宪法

B.法律

C.行政法规

D.地方性法规

E.部门规章

炉前有哪些主要设备？其作用是什么？