问题 选择题

我们这样一个人口众多的发展中的社会主义大国,任何时候都不能依靠别人搞建设,必须始终坚持的根本基点是                                                   

A.独立自主、艰苦奋斗

B.自力更生,艰苦奋斗

C.独立自主、自力更生

D.自力更生,艰苦创业

答案

答案:C

题目分析:此题主要考查学生对教材基础知识的掌握。根据教材知识。我们作为一个发展中的社会主大国,任何时候都不能依靠别人搞建设,必须始终坚持独立自主,自力更生。把独立自主、自力更生作为自己发展的根本基点。

多项选择题


某垃圾填埋场工程,具体情况如下:
项目性质扩建
建设规模平均日处理规模为550t/d
使用年限服务年限为12年
占地面积222亩
工程组成 填埋场性质山谷型填埋场,属Ⅳ类Ⅲ级垃圾填埋场
填埋库容填埋库容约276×104m3,可填埋垃圾总量248.4万吨
主要工艺方案采用分区、分单元、逐日填埋覆土的填埋工艺
垃圾坝垃圾主坝

浆砌块石坝坝顶轴线长173.0m,坝顶宽4.0m,坝顶标高35.0m,

最大坝高18.0m,上游坝面坡度为1:0.10,下游坝面坡度1:0.60,

用M10水泥砂浆砌MD30块石砌筑

垃圾副坝

副垃圾坝采用碾压式土坝坝型,土工膜铺面防渗。

坝顶轴线360m,坝顶宽6.0m,平行于某调整公路布置,靠垃圾库区

一侧坝面坡度为1:(1.5~2.0),背库区一侧坝坡坡度1:1.5

截污坝渗滤液截污坝坝顶高程为20.0m,采用碾压式土坝坝型,土工膜铺面防渗。坝顶轴线长154m,坝顶宽4.0m。坝高约5.5m,坝上下游坝面坡度均为1:2.0

工程组成
防渗系统采用高密度聚乙烯(HDPE)土工膜水平防渗。其中HDPE防渗系数K≤1.0×10-13cm/s
渗滤液导排系统主要由底部防渗层上的反渗层、集液导排盲沟和竖向石笼组成
渗滤液收集系统在主垃圾坝下游,利用截污坝挡水,建设垃圾渗滤液调节池,库底、库岸铺HDPE防渗膜,调节池容积为10000m3。并设置一座垃圾渗滤液提升泵房。垃圾渗滤液纳入原垃圾填埋场垃圾渗滤液处理站处理达《污水综合排放标准》(GB 8978—1996)三级标准后纳入污水处理厂处理
地下水导排系统库底及调节池底防渗膜下层设置排除地下水盲沟.地下水由盲沟中的排水管引排至调节池下游冲沟
填埋气体导排处理系统由次盲沟及竖向导气石笼、拉拔式垂直导气井、移动式集气站、集气支管和集气干管等组成。填埋气体经收集后经垃圾填埋气体集中焚烧处理站集中焚烧处理
防洪系统设置疏导上游洪水的地下导排管、环库洪沟和封场后设置表面排水沟等组成库区防洪系统
配套工程建筑物辅助主要有洗车台、地磅房、计量区
道路工程进场道路从34省道接入,沿现有渗滤液处理站场区南侧老垃圾填埋场碎石路面改造,总长约350m,路宽7.0m
给排水系统用水用10t洒水车从市区运送,排水采用分流制
[问题]

施工期的噪声源有( )。

A.运输汽车

B.施工人员发出的声音

C.推土机

D.周边生态物种发出的声响

阅读理解

阅读理解。

     You never see him, but they're with you every time you fly. They record where you are going, how fast

you're traveling and whether everything on your airplane is functioning normally. Their ability to withstand

(承受) almost any disaster makes them seem like something out of a magic book. They're known as the black

box.   

     When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean

June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine

(潜水艇) detected the device's (设备) signal five days later, the discovery marked a huge step toward

determining the cause of a tragedy in which 152 passengers were killed.   

     In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic

information like altitude and direction. That was the first mode for a black box, which became a requirement

on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965

the box was completely redesigned and moved to the back of the plane - the area least affected by impact-from

its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that

the boxes, which were never actually black, be painted orange or yellow to be discovered more easily.   

     Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations, and a

flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help

investigators reconstruct the aircraft's final moments. Placed in an insulated (隔绝的) case and surrounded by

a quarter-inch-thick panels of stainless steel, the boxes can withstand huge force and temperatures up to

2,000℉. When in deep water, they're also able to send signals from depths of 20,000 ft. Experts believe the

boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep,

but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years,

only one plane's black boxes were never recovered.

1. What does the author say about the black box?   

A. It ensures the normal functioning of an airplane.   

B. The idea for its design comes from a magic book.   

C. Its ability to avoid disasters is unbelievable.   

D. It is an inseparable device on an airplane.

2. What information could be found from the black box on the Yemeni airliner?   

A. Data for analyzing the cause of the crash.   

B. The total number of passengers on board.   

C. The scene of the crash and extent of the damage.   

D. Signals sent by the pilot before the crash.

3. Why was the black box redesigned in 1965?   

A. New materials became available by that time.   

B. Too much space was needed for the device.   

C. The early models often got damaged in the crash.   

D. The early models didn't provide the needed data.

4. Why did the Federal Aviation Authority require the black boxes be painted orange or yellow?   

A. To distinguish them from the colour of the plane.   

B. To caution people to handle them with care.   

C. To make them easily discovered.   

D. To meet with international standards.

5. What do we know about the black boxes from Air France Flight 447?   

A. There is still a good chance of their being recovered.   

B. There is an urgent need for them to be reconstructed.   

C. They have stopped sending signals back.   

D. They were destroyed somewhere near Brazil.