What conclusion can be drawn from this passage?
A. Trade unions in Britain are becoming more popular.
B. Most strikes in Britain arc against the British law.
C. Unofficial strikes in Britain are easier m deal with now.
D. Employer-worker relations in Britain have become tenser.
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Which of file following can NOT be inferred from the passage?
A. China developed advanced technology in printing long before any other countries in the world.
B. Move people read newspapers in English than in any other languages.
C. Japan is the country where people read more newspapers.
D. Newspapers have developed quickly in the U.S. since the beginning of the 18th century.
听力原文: In a police station, an officer managed to get some fresh mushrooms. He was so happy that he agreed to share the mushrooms. When their breakfast arrived the next day, each officer found some mushrooms on his plate.
"Try the dog with a piece first," suggested a careful officer who was afraid that the mushrooms might be poison OHS.
The dog seemed to enjoy its mushrooms, and the of ricers then began to eat their meal, feeling quite satisfied with its good taste.
After an hour, however, they were so frightened when the gardener rushed in to announce that the dog was dead. Immediately, the officers jumped into their cars and rushed to the nearest hospital. Stomach pumps were used and the officers had a very unpleasant time getting rid of the re mains of the mushrooms.
When they returned, they sat down and started to discuss the whole matter. Each man described the pains that he felt and they agreed that these had grown worse on the way to the hospital.
The gardener was called in to give a detailed account of the way in which the poor dog had died.
"Did it suffer much before it died?" asked one of the officers, feeling very pleased that he had escaped a painful death himself. The gardener looked rather surprised. "No. "he said. "It was killed instantly when a car hit it."
Why did an officer want to give the dog a piece of mushroom?
A. He was so pleased that he wanted to share the mushroom with it.
B. The dog would enjoy the mushroom.
C. He liked the dog very much.
D. He was afraid of mushroom poisoning and wanted to test the mushroom by the dog.
RL串联电路如下图所示,已知电流表读数为1A,电压表读数为8V,R=6Ω,则端口电压等于()V。
A. 8
B. 10
C. 12
D. 14
如下图所示为发射极单管电压放大电路,则估算静态点IB为()。
A. 46μA
B. 52μA
C. 57μA
D. 61μA