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A smoke _____ system provides families with early warning of

题目
单选题
A smoke _____ system provides families with early warning of fire.
A

collection

B

repression

C

detection

D

resonance

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相似问题和答案

第1题：

Most of the host operating system provides a way for a system administrator to manually configure the IP information needed by a host .Automated configuration methods such as ______, are required to solve the problem.

A．IPsec

B．DHCP

C．PPTP

D．SOAP


正确答案：B

第2题：

Which part provides for transverse control and positioning of a boom in a conventional yard and stay system ________．

A.Guy

B.Shroud

C.Spider

D.Topping lift


正确答案：A

第3题：

Growing numbers of scientists therefore see Antarctica as a distant early warning sensor, where potentially dangerous global trends may be spotted before they show up to the north.

_______________________________________________________________________________


正确答案：
因此，越来越多的科学家把南极洲视为一个远距离早期报警敏感器，在那里地球许多潜在的危险动向早在它们出现于北方以前就能被发现。

第4题：

共用题干
第三篇

Listening Device Provides Early Landslide（山崩；地滑；塌方）Warning

A device that provides early warning of a landslide by monitoring vibrations（振动）in soil is being tested
by UK researchers.The device could save thousands of lives each year by warning when an area should be
evacuated（疏散，撤走）,the scientists say. Such natural disasters are common in countries that experience
sudden , heavy rainfall（降雨，降雨量）, and can also be triggered by earthquakes and even water
erosion（腐蚀，侵蚀）.
Landslides start when a few particles of soil or rock within a slope start to move,but the early stages can
be hard to spot.Following this initial movement,"slopes can become unstable in a matter of hours or
minutes,"says Nell Dixon at Southborough University,UK. He says a warning system that monitors this
movement"might be enough to evacuate a block of flats or clear a road,and save lives".
The most common way to monitor a slope for signs of an imminent（即将发生的）landslide is to watch
for changes in its shape. Surveyors can do this by measuring aside directly , or sensors（传感器）sunk into
boreholes（钻孔，井眼）or fixed above ground can be used to monitor the shape of a slope. Slopes can,
however,change shape without triggering a landslide,so either method is prone to causing false alarms.Now
Dixon's team has developed a device that listens for the vibrations caused when particles begin moving
within a slope.
The device takes the form of a steel pipe dropped into a borehole in a slope.The borehole is filled in
with gravel（砾，沙砾，砾石）around the pipe to help transmit high-frequency vibrations generated by particles
within the slope.These vibrations pass up the tube and are picked up by a sensor on the surface.Software
analyses the vibration signal to determine whether a landslide niay be imminent.
The device is currently being tested in a 6-metre-tall artificial clay embankment（堤岸）in Newcastle,
UK. Early results suggest it should provide fewer false positives than existing systems.Once it has been
carefully and thoroughly tested,the device could be used to create a complete early-warning system for
dangerous slopes.
"Locations with a significant risk of landslides could definitely benefit from a machine like this,"says
Adam Poulter,an expert at the British Red Cross,"As long as it doesn't cost too much."But,Poulter adds
that an early-warning system may not be enough on its own."You need to have the human communication,"
he says,"Making systems that get warnings to those who need them can be difficult."

What does"Such natural disasters"in the first paragraph refer to?
A:Sudden,heavy rainfall.
B:Earthquakes.
C:Water erosion.
D:Landslides.

答案：D
解析：
短文第一段第一句提到了山体滑坡，此处的自然灾害指的是上文的山体滑坡，故选D。
短文第二段第一、二句提到“滑坡开始时，一个山坡上的土壤或岩石粒子移动，但初期 可能很难辨认。然后山坡在数小时或数分钟内可能变得不稳固”，故选D。
短文第三段倒数第二句提到“……任何一种方法（普通方法）都可能产生错误预警”，故 选C。
根据短文第四段第二句可知，地上凿出的洞而非该装置是用砾石填充的，A项的叙述不 正确。故选A。
此句意为“早期的结果表明它应该提供比现有系统更少的不实证据”，故选B。 positive 意为“确凿的证据”。第5部分：补全短文

第5题：

An extinguishing agent which effectively cools, dilutes combustible vapors, removes oxygen, and provides a heat and smoke screen is ______.

A.carbon dioxide

B.Halon 1301

C.dry chemical

D.water fog


正确答案：D
具有有效的冷却，稀释可燃性气体，移除氧气并提供热和烟的保护层的灭火剂是水雾。

第6题：

Which system provides redundant system clocks?()

A.Power 595

B.Power 560

C.Power 570

D.Power 550


参考答案：A

第7题：

Using an inert gas system on a tanker has which advantage（s）________．

A.Provides for faster loading

B.Lowers oxygen content in the tank

C.Provides better fuel economy

D.All of the above


正确答案：B

第8题：

It is a terrible illustration of man &39; s weakness to nature ,and the tsunami(海 啸) that struck the Japanese coast in March, 2011 has illustrated the difficulty of fighting against natural disasters, even for a prosperous nation.

Totally preventing tsunami-damage is impossible. But there is much that can be done to minimize damage and loss of life. Measures that can be taken include designing solid buildings, and developing early-waming systems, public education programs and evacuation(疏散) strategies. Moreover, the approach of a tsunami is possibly picked up by the sensors of complicated international waming systems. Countries can use radio and television broadcasts as well as loudspeaker networks to warn the public.

But an early waming system depends on how far the tsunami strikes, if it&39; s close by, the warning system is not going to be very effective. When people are faced with an unstoppable force like a tsunami the massive waves created by events like underwater earthquakes, the best course of action for them is to get inland and to the higher ground as quickly as possible.

51. The first paragraph tells us that________

A.man can easily defeat the nature

B.tsunamis take place only in Japan

C.man’ s ability to cope with natural disasters is limited

D.the tsunami-damage in Japan is not so terrible

To prevent tsunami-damage, the following measures can be taken EXCEPT________A.designing firm buildings

B.developing early-warning systems

C.developing evacuation strategies

D.keeping the public unaware of the seriousness of tsunamis

When a tsunami happens, the best course of action for people is to________A.listen to radio and television broadcasts for information

B.get inland and to the higer ground as quickly as possible

C.stay where they are

D.rely on the warning systems

According to the passage , which of the folloiwing can cause a tsunami ?A.Storms

B.Massive waves

C.Underwater earthquakes

D.Floods

Which of the following statements is correct according to che passage?A.The total prevention of tsunamis is possible

B.Rich countries are less affected by tsunamis than poor countries

C.Approaching tsunamis can possibly be picked up by sensors

D.An early warning system is effective when a tsunami is close by

请帮忙给出每个问题的正确答案和分析，谢谢！


问题 1 答案解析：C


问题 2 答案解析：D


问题 3 答案解析：B


问题 4 答案解析：C


问题 5 答案解析：C

第9题：

Most of the host operating system provides a way for a system administrator to manually configure the IP information needed by a host. Automated configuration methods, such as （）, are required to solve the problem.

A.IPSec
B.DHCP
C.PPTP
D.SOAP

答案：B
解析：
DHCP是一个局域网的网络协议，使用UDP协议工作，主要用途是给内部网络或网络服务供应商自动分配IP地址给用户，给内部网络管理员作为对所有计算机作中央管理的手段。Internet协议安全性（IPSec）是一种开放标准的框架结构，通过使用加密的安全服务以确保在Internet协议（IP）网络上进行保密而安全的通信。PPTP协议是在PPP协议的基础上开发的一种新的增强型安全协议,支持多协议虚拟专用网（VPN），可以通过密码身份验证协议（PAP）、可扩展身份验证协议（EAP）等方法增强安全性。可以使远程用户通过拨入ISP、通过直接连接Internet或其他网络安全地访问企业网。简单对象访问协议（SOAP）是一种轻量的、简单的、基于XML的协议，它被设计成在Web上交换结构化的和固化的信息。SOAP可以和现存的许多因特网协议和格式结合使用，包括超文本传输协议（HTTP），简单邮件传输协议（SMTP），多用途网际邮件扩充协议（MIME）。它还支持从消息系统到远程过程调用（RPC）等大量的应用程序。用于配置IP信息的是DHCP协议，因此选B

第10题：

共用题干
第三篇

Listening Device Provides Early Landslide（山崩；地滑；塌方）Warning

A device that provides early warning of a landslide by monitoring vibrations（振动）in soil is being tested
by UK researchers.The device could save thousands of lives each year by warning when an area should be
evacuated（疏散，撤走）,the scientists say. Such natural disasters are common in countries that experience
sudden , heavy rainfall（降雨，降雨量）, and can also be triggered by earthquakes and even water
erosion（腐蚀，侵蚀）.
Landslides start when a few particles of soil or rock within a slope start to move,but the early stages can
be hard to spot.Following this initial movement,"slopes can become unstable in a matter of hours or
minutes,"says Nell Dixon at Southborough University,UK. He says a warning system that monitors this
movement"might be enough to evacuate a block of flats or clear a road,and save lives".
The most common way to monitor a slope for signs of an imminent（即将发生的）landslide is to watch
for changes in its shape. Surveyors can do this by measuring aside directly , or sensors（传感器）sunk into
boreholes（钻孔，井眼）or fixed above ground can be used to monitor the shape of a slope. Slopes can,
however,change shape without triggering a landslide,so either method is prone to causing false alarms.Now
Dixon's team has developed a device that listens for the vibrations caused when particles begin moving
within a slope.
The device takes the form of a steel pipe dropped into a borehole in a slope.The borehole is filled in
with gravel（砾，沙砾，砾石）around the pipe to help transmit high-frequency vibrations generated by particles
within the slope.These vibrations pass up the tube and are picked up by a sensor on the surface.Software
analyses the vibration signal to determine whether a landslide niay be imminent.
The device is currently being tested in a 6-metre-tall artificial clay embankment（堤岸）in Newcastle,
UK. Early results suggest it should provide fewer false positives than existing systems.Once it has been
carefully and thoroughly tested,the device could be used to create a complete early-warning system for
dangerous slopes.
"Locations with a significant risk of landslides could definitely benefit from a machine like this,"says
Adam Poulter,an expert at the British Red Cross,"As long as it doesn't cost too much."But,Poulter adds
that an early-warning system may not be enough on its own."You need to have the human communication,"
he says,"Making systems that get warnings to those who need them can be difficult."

Why do researchers develop a new device to monitor signs of landslides?
A:Because the new device can measure the site directly.
B:Because the new device can be sunk into boreholes or fixed above ground.
C:Because the common methods can cause false alarms.
D:Because the common methods are useless.

答案：C
解析：
短文第一段第一句提到了山体滑坡，此处的自然灾害指的是上文的山体滑坡，故选D。
短文第二段第一、二句提到“滑坡开始时，一个山坡上的土壤或岩石粒子移动，但初期 可能很难辨认。然后山坡在数小时或数分钟内可能变得不稳固”，故选D。
短文第三段倒数第二句提到“……任何一种方法（普通方法）都可能产生错误预警”，故 选C。
根据短文第四段第二句可知，地上凿出的洞而非该装置是用砾石填充的，A项的叙述不 正确。故选A。
此句意为“早期的结果表明它应该提供比现有系统更少的不实证据”，故选B。 positive 意为“确凿的证据”。第5部分：补全短文

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