雷电具有（）的危害。 A.导致大规模停电 B.引起火灾和爆炸 C.使人遭到强烈电击

Taking away a city’s rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can’t eat or use. If we kept these things we would soon have a mountain of rubbish.

In some cities the rubbish is collected and taken outside of the city to a dump(垃圾站). Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewagesystem takes away the used water from toilets, bathtubs(澡盆) and other places.

To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you’d never know that this had once been an old rubbish dump.

In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus(腐殖土), which looks like black earth. It is rich with kinds of things that feed plants and help make them grow.

小题1:You can most probably read the passage in _______.

A．a history book

B．a TV guide

C．a science book

D．a telephone book小题2:The underlined word “sewage” in the passage means_______.

A．排污

B．染色

C．洗涤

D．吸尘小题3:According to the passage, the food parts of rubbish can be used again_______.

A．to feed animals

B．to feed plants

C．to build a house

D．to make machines小题4:How should we take care of a used metal box according to the passage?

A．By burning it off.

B．By putting it in water.

C．By throwing it away.

D．By reusing and recycling it.

有关放置宫内节育器的并发症，应除外（）

A.节育器脱落

B.节育器嵌顿

C.血肿

D.子宫穿孔

E.带环妊娠

阅读以下有关嵌入式系统设计的说明，在答题纸上回答问题1至问题3。

说明：

某公司承接了某机载嵌入式系统的研制任务。该机载嵌入式系统由数据处理模块、大容量模块、信号处理模块、数据交换模块和电源模块等组成。数据处理模块有2个，分别完成数据融合和导航通讯任务；大容量模块主要功能是存储系统数据，同时要记录信号处理模块、数据处理模块的自检测、维护数据，向数据处理模块提供地图数据；信号处理模块的处理器为专用的DSP，接收红外、雷达等前端传感器数据并进行处理，将处理后的有效数据（数据带宽较大）发送给数据处理模块；数据交换模块主要负责系统的数据交换：电源模块主要负责给其他模块供电，电源模块上没有软件。

要求该机载嵌入式系统符合综合化、模块化的设计思想，并考虑系统在生命周期中的可靠性和安全性，以及硬件的可扩展性和软件可升级性，还要求系统通讯延迟小，支持多模块上的应用任务同步。

为了实现满足ARINC653标准的操作系统的时空分区隔离机制，项目组选择了PowerPC作为数据处理模块的处理器（CPU）。这样，当一个分区出现故障时，不会蔓延到模块中同一处理器的其他分区。请用500字以内的文字，说明如何采用PowerPC实现应用与内核以及诸应用之间的隔离和保护。

按照《建筑安装工程费用项目组成》(建标[2003]206号)的规定，对建筑材料、构件和建筑安装物进行一般鉴定，检查所发生的费用列入( )。

A．业主的研究试验费
B．承包商的其他直接费
C．承包商的材料费
D．承包商的措施费

我国境内注册的公司在香港发行并在香港上市的普通股票称为( )。

A．F股

B．H股

C．B股

D．A股