阅读理解。
A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or
changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.
Grimsvom is one of the largest and most active volcanoes in Europe. What makes Grimsvom
different is that it lies under a huge glacier(冰川) of ice up to 12 meters thick. The hot volcano
heats up the ice above it, which then forms a layer(层)of water between the glacier and the volcano.
This layer of water puts pressure on the volcano, keeping it stable. As the water flows out from under
the glacier, the pressure lifts. The lava(岩浆) from the volcano then comes up to the surface. This is
exactly what happened today.
Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic
ash. According to KLM,one of Europe's biggest airlines, airplanes cannot go under the cloud or over
it. Going through the cloud can result in ash getting stuck in the airplane's engines, causing damage to
the plane.
The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp
glasslike rocks all over the countryside. Farmers are keeping their animals inside to stop them from
eating ashcovered grass or the sharp object.
1．What makes Grimsvom different from other volcanoes?
A．It is below ice.
B．It lies under the sea.
C．It is the largest volcano.
D．Its lava affects the airlines.
2．What keeps Grimsvom still?
A．The slow flow of water.
B．The low water temperature.
C．The thick glacier.
D．The water pressure.
3．Which of the following is the result of the volcanic eruption?
A．People stop traveling in Europe.
B．Airlines suffer from the loss of planes.
C．It becomes dangerous for animals to eat outside.
D．Farmers have lost many of their animals.
4．This text is most probably taken from________.
A．a research paper
B．a newspaper report
C．a class presentation
D．a geography textbook
CO2
2H2↑+O2↑