2010清华在线GCT模拟题二(29)

2010清华在线GCT模拟题二

B. After the animal has done the trick C. When the animal is hungry

D. To make the animal does the trick

13. Pigeons are used to inspect the small steel balls because_____. A. They like seeds

B. They can make a noise C. They can see well D. They are clever birds

14. The pigeon touches the plate with its beak when _____ A the light goes on B it sees a fault C. it sees the seeds D it hears a noise

15 According to the passage, which of the following statements is NOT true ? A Apes have worked in a factory B An ape is a large monkey

C Apes may be trained to do useful work D Apes have been used to gather crops

Questions 16-20 are based on the following passage:

On the night of December 1, 1930, a dense fog moved over the Meuse Valley, in Belgium. Many factories in the valley poured smoke and fumes into the foggy air. This created a dark smog of smoke and fog combined. People in the valley began to cough and strain for breath. The smog remained for four days. During that time, thousands of people became ill. The hospitals were filled with patents. Sixty people died. Most of them were older with heart and lung problems. Finally, a heavy rain washed away the smog. Scientists studied the causes of the disaster. They concluded that the illnesses and deaths were caused by chemicals in the smog.

The first reported event of this kind in the United States happened in Donora, a factory town in a valley near Pittsburgh. In 1948, a killer smog made half of the population sick; there were 17 deaths. Again, older people with lung or heart ailments were hit hardest.

London, England, has always been known for its “black fogs.” in the winter of 1952, a milky white fog rolled into the city. It soon turned into black smog as the smoke of the city poured into the air. It was so hard to see that people had to walk in front of the buses to guide them. In this way, the most serious air pollution disaster in history began. When it was over, more than 4,000 people had been killed by the thick black smog.

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