大学英语三级考试考前辅导练习十九
Many countries have built canals near the coast, and parallel to the coast. These waterways make it possible for boats to travel between ports along the coast without being exposed to the dangers of the open sea.
1.Where were canals first built?
A. Suez
B. Panama
C. Holland
D. No one knows
2.A canal must be deep enough to leave how many feet of water beneath the bottom of the largest boat using the canal?
A. One foot of water
B. Two feet of water
C. Five feet of water
D. Ten feet of water
3.The Aswan Dam was built primarily for what purpose?
A. Navigation
B. Irrigation
C. Drainage
D. Electricity
4.Compared to other means of water transport, canal boats are___________.
A. cheaper and sometimes faster
B. more expensive, but faster
C. cheaper, but more dangerous
D. more expensive and slower
5.Are canals ever built parallel to the sea coast?
A. No, because boats can use the sea
B. Yes, to protect boats from storms.
C. No, because the sea can flood the canals
D. Yes, to protect boats from attacks.
It is plain that in the year 2020 everyone will have at his elbow several times more mechanical energy than he has today.
There will be advance in biological knowledge as far-reaching as those that have been made in physics. We are only beginning to learn that we can control our biological environment as well as our physical one. Starvation has been predicted twice to a growing world population: by Malthus in about 1800, by Crookes in about 1900. It was headed off the first time by taking agriculture to America and the second time by using the new fertilizers. In the year 2020, starvation will be headed off by the control of the diseases and the heredity(遗传) of plants and animals---by shaping our own biological environment.
Now I come back to the haunting theme of automation. The most common species in the factory today is the man who works or minds a simple machine---the operator. By the year 2020, the repetitive tasks of industry will be taken over by the machines, as the heavy tasks were taken over long ago; and the mental tedium will go the way of physical exhaustion. Today we still distinguish, even among repetitive jobs, between the skilled and the unskilled; but in the year 2020 all repetition will be unskilled. We simply waste our time if we oppose this change; it is as inevitable as the year 2020 itself.
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