2005年职称英语理工类(A级)试题及答案

36 A big problem facing people today is that

A they must tolerate phone disturbances or miss important calls．

B they must turn off their phones to keep their homes quiet．

C they have to switch from a desktop phone to a cellphone．

D they are too busy to make phone calls．

37 The behavior sensor and software system built in a phone

A could help store messages．

B  could send messages instantly

C could tell when it is wise to interrupt you．

D could identify important phone calls．

38 Scientists at Carnegie Menon University tried to find out

    A why office doors were often 1eft open．

    B when it was a good time to turn off the computer．

    C what questions office workers were bothered with．

    D which behaviors could tell whether a person was busy

39 During the experiment，the subjects were asked

    A to control the sensors and the camera．

    B to rate the degrees to which they could be interrupted．

    C to compare their behaviors with others’．

    D to analyze all the indicators of interruption．

40 The computer performed better than people in the study because

    A  the computer worked harder．

    B  the computer was not busy

    C  people tended to be biased．

    D  people were not good at statistics．

第三篇

The Exploding Lakes of Cameroon

  What comes to mind when you think of a lake? You probably imagine a pretty scene with

blue water，birds，and fish．For the people in the northwestern Cameroon，however, the image is

very different.  For them，lakes may mean terrible disasters.  In 1984，poisonous gases exploded

out of  Lake Monoun and came down into the nearby villages，killing thirty—seven people．Two

years later,Lake Nyos erupted A cloud of gases rolled down the hills and into the valleys and

killed 1,700 people．

    Lake Nyos and Lake Monoun are crater(火山口)lakes They were formed when water

collected in the craters of old volcanoes The volcanoes under Lake Nyos and Lake Monoun are

not active anymore.  However, poisonous gases from the center of the earth continue to flow up

through cracks in the bottom of the lake. This is normal in a crater lake. In most crater lakes，these

gases are released often because the water‘turns over’regularly．That is，the water from the

bottom of the lake rises and mixes with the water at the top，allowing the gases to escape slowly．

    However，in Lakes Nyos and Monoun，there is no regular turning over．No one knows the

reason for this fact，but as a result，these lakes have more gases tapped at the bottom than other

crater lakes.  In fact，scientists who have studied Lakes Nyos and Monoun have found 16,000

times more gases．When a strong wind，cool weather a storm，or a landslide(滑坡)causes the

water to turn over suddenly，the gases escape in a violent explosion．

  In the past，no one knew when the gases might explode，so there was no way for the villagers

to escape disaster.  Now scientists from the United States，France，and Cameroon have found a

way to reduce the gas pressure at the bottom of Lake Nyos．They stood a 672-foot plastic pipe in

the middle of the lake，with one end of the pipe near the bottom and the other end in the air．Near

the top of the pipe，the team put several holes that could be opened or closed by a computer．Now，

when the gas pressure gets too high，the holes are opened and some of the gas-filled water shoots

up through the pipe into the air like a fountain．With less pressure，a disastrous explosion is much

less likely．However, the scientists are not sure that one pipe will be enough to prevent explosions．They hope to put in others soon and they plan to install a similar pipe and a computer system at Lake Monoun as well．

  To protect people nearby until all of the pipes are in place．the scientists have installed early

warning systems at both lakes.  If the gas pressure rises to a dangerous level，computers will set

off loud sirens(警报)and bright lights to warn the people in the villages．That way, they will

have time to escape from the dangerous gases．

41 What will happen when Lake Nyos and Lake Monoun explode?

    A  Water will flow down the hills

    B  Poisonous gases will be released suddenly．

    C  A strong wind will rise from the lakes

    D  The volcanoes will come to life．

42 Which of the following statements about Lake Nyos and Lake Monoun is true?

  A  They were formed in 1984．

  B  They are at the top of two active volcanoes．

  C  They are not like most other crater lakes．

  D  Water in them turns over regularly．

43 Lake Nyos and Lake Monoun explode because

A  the gases rise to the top and mix with air．

B  people from the villages turn over the water．

C  scientists have put in a computer system．

D  they have more gases trapped at the bottom than other crater lakes

44 A team of scientists has

A  erected a pressure-releasing pipe in the lake

B  identified the gases at the bottom of the lake

C  built a beautiful fountain near the lakes

D  removed all dangerous gases from the lakes

45 What do we learn from the last paragraph?

A  Scientists are planning to install pipes in all crater lakes．

B  Scientists still do not know how to prevent gas explosions

C  Explosion disasters could be avoided in the future

D  Warning systems have been set up in the villages nearby．