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Alison closed the door of her small flat and put down her briefcase. As usual, she had brought some work home from the travel agency. She wanted to have a quick bite to eat and then, after spending a few hours working, she was locking forward to watching television or listening to some music. She was just about to start preparing her dinner when there was a knock at the door. 'Oh, no ! Who on earth could that be?' she muttered to herself. She went to the door and opened it just wide enough to see who it was. A man of about sixty was standing there. It took her a moment before she realized who he was. He lived in the flat below. They had passed each other on the stairs once or twice, and had nodded to each other but never really spoken.
"Uh, sorry to bother you, but …uh…there's something I'd like to talk to you about," he mumbled. He had a long, thin face and two big front teeth that made him look rather like a rabbit. Alison hesitated, but then, opening the door wide, asked him to come in. It was then that she noticed the dog. She hated dogs——particularly big ones. This one was a very old, very fat bulldog. The man had already gone into her small living-mom and, without being asked, had sat down on the sofa. The dog followed him in and climbed up on the sofa next to him, breathing heavily. She stared at it. It stared back.
The man coughed. "Uh, do you mind if I smoke?" he asked. Before she could ask him not to, he had taken out a cigarette and lit it. "I'll tell you why I've come. I…I hope you won' t be offended but, well…,"he began and then stopped. Suddenly his face went red. His whole body began to shake. Then another cough exploded from somewhere deep inside him. Still coughing, he took out a grey, dirty- looking handkerchief and spat into it. Afterwards he put the cigarette hack into his mouth and inhaled deeply. As he did so, some ash fell on the carpet.
The man looked around the room. He seemed to have forgotten what he wanted to say. Alison glanced at her watch and wondered when he would get to the point. She waited. "Nice place you've got here," he said at last.
How do you think Alison felt when she heard the knock at the door?

Afraid.
B. Irritated.
C. Pleased.
D. Curious.

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The science master, a man called Vernier, stepped in and stood on his small platform. Vender set the experiments for the day and demonstrated them, then retired behind the "Church Times" which he read seriously in between walking quickly along the rows of laboratory benches, advising boys. It was a simple heat experiment to show that a dark surface gave out more heat by radiation than a bright surface.
During the class, Vernier was called away to the telephone and Abu as not about, having retired to the lavatory for a smoke. As soon as a posted guard announced that he was out of sight, minor pandemonium (混乱) broke out. Some of the boys raided the store. The wealthier ones took rubber tubing to make catapults and to repair bicycles, and helped themselves to chemicals for developing photographic films. The poorer boys, with a more determined aim, took only things of strict commercial interest which could be sold easily in the market. They emptied stuff into bottles in their pockets. Soda for making soap, magnesium sulphate for opening medicine, salt for cooking, liquid paraffin for women's hairdressing, and fine yellow iodoform. powder much in demand for sprinkling on sores. Kojo objected mildly to all this. "Oh, shut up!" a few boys said. Sorie, a huge boy who always wore a fez indoors, commanded respect and some leadership in the Class. He was gently drinking his favorite mixture of diluted alcohol and bicarbonate——which he called "gin and fizz"——from a beaker. "Look here, Kojo, you are getting out of hand. What do you think our parents pay taxes and school fees for? For us to enjoy——or to buy a new ear every year for Simpson?" The other boys laughed. Simpson was the European headmaster, feared by the small boys, adored by the boys in the middle school, and liked, in a critical fashion, with reservations, by some of the senior boys and African masters. He had a passion for new motor-cars, buying one yearly.
"Come to think of it," Sorie continued to Kojo, "you must take something yourself, then we'll know we are safe." "Yes, you must," the other boys insisted. Kojo gave in and, unwillingly, took a little nitrate for some gunpowder experiments which he was carrying out at home. “Someone!” the look-out called.
The boys ran back to their seats in a moment. Sorie washed out his mouth, at the sink with some water. Mr Abu, the laboratory attendant, entered and observed the innocent expression on the faces of the whole class. He looked round fiercely and suspiciously, and then sniffed the air. It was a physics experiment, but the place smelled chemical. However, Vernier came in then. After asking ff anyone was in difficulties, and finding that no one could in a moment think up anything, he retired to his chair and settled down to an article on Christian reunion.
The boys were afraid of Mr Abu because ______.

A. he had been an Army sergeant and had military ideas of discipline
B. he reported them to the Science masters whenever he caught them petty thieving
C. he was cruel
D. he believed in strict discipline

聚山梨酯80E.

某工程双代号网络图如下图所示,说法正确的是()。

A. 工作A的FF为4
B. 工作D的FF为1
C. 工作I的LF为13
D. 工作E的FF为1

温度对药物降解反应影响的方程式E.

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