Lecture : (2)
lesson 9: A trip to Mars
By now, a rocket will have sent off on its thirty-five million-mile trip to
Mars, and scientists must be waiting anxiously for the results. The rocket
will be travelling for six months before it reaches the planet, It contains a
number of scientific instruments, including a television camera. Any
pictures that are taken will have to travel for three minutes before they
reach the Earth. If these pictures are successful, they may solve a
number of problems about the Mars and provide information about the
marking on its surface, which, nearly one hundred years ago. The
astronomer, Schiaperilli , thought to be canals.
It will be a long time before any landing on Mars can be attempted. This
only be possible when scientists have learned a lot more about the
atmosphere that surrounds the planet. If a satellite can, one day, be put
into orbit around the Mars, scientists would be able to find out a great
deal.
An interesting suggestion for measuring the atmosphere around the
Mars has been put forward. A rubble ball containing a radio transmitter
could be dropped from the satellite, so that it would fall forward the
surface of the planet. The radio will signal the rate at which the ball was
slowed down, and scientists will be able to calculate how dense the
atmosphere is. It may even be possible to drop a capsule containing
scientific instruments onto the planet's surface. Only one of the great
deal more information has been obtained, will it be possible to plan a
manned trip to Mars.
Comprehension and précis
The answer
1. the scientist must learn a lot more information about the atmosphere
that surrounds the planet before anyone attempts to go there.
2. A rubber ball could be dropped from a satellite.
3. the ball contain a radio transmitter .
4. scientist would be able to calculate the density of the atmosphere
when the radio would signal the rate at which the ball was slowed down.
5. information about Mars could be obtained by dropping a capsule
which contains scientific instruments on to planet's surface.
Précis
The scientist must learn a lot more information about the
atmosphere that surrounds the planet before anyone attempts to go
there. A rubber ball could be dropped from a satellite. The ball contain a
radio transmitter .Scientist would be able to calculate the density of the
atmosphere when the radio would signal the rate at which the ball was
slowed down. Moreover, information about Mars could be obtained by
dropping a capsule which contains scientific instruments on to planet's
surface.
Composition
A Trip to the Moon
Exercise:
1.
2.
3.
4.
He must be doing his homework.
He must have been doing his homework.
We could have been playing tennis .
We must have been waiting for the bus for over an hour before it
arrived.