B 根据下面短文回答下列问题。 Tom was seven years old. He went to a school near his house. He could go there and come home by bus or by school-bus every day, but he always went to school and came home on foot. He usually got back on time, but last Friday he came home late from school. When he ran into the house, his mother was in the sitting room. When she saw him, she said, "Why are you late today, Tom" "My teacher was angry and sent me to the headmaster after school." Tom answered. "To the headmaster" his mother said in surprise. "Why did she send you to him" "Because she asked a question in class," Tom said, "and none of the children gave her the answer except me." Her mother was angry. "But why did the teacher send you to the headmaster then Why didn’t she send all the other children she asked Tom." "Because her question was who put the glue (胶水) on her chair.\ Tom’s school was not far from his home.
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[A] Thank you for(your)calling.[B] Shall we meet at 3:00 at the gate[C] OK, that’s fine.[D] Hi! Can I speak to Tom[E] What’s the time, please[F] Yes, I’ll be free.[G] When and where shall we meet What time is it
补写出下列名句名篇中的空缺部分。 幼者听而弗问,______。(《学记》)
C 根据下面短文回答下列问题。 Peter has been worried all the week. He got a letter from the police (警方). They told him to go to the police station (警察局) as soon as he got the letter. Peter wondered (不知道) why the police wanted him. He went to the police station yesterday, and now he is not worried any more. At the station a smiling policeman told him that they had found his bike five days ago. The policeman said, they found his bike in a small village four hundred miles (英里) away. Now they were sending it to his home by train. Peter was very much surprised when he heard the news. He never thought he could have found the bike. He lost it twenty years ago when he was a boy of fifteen. The policeman was sending the bike back to Peter by plane.
A. [A] True
B. False
事务T1,T2,T3分别对数据D1,D2,D3并发操作如下图所示,其中T1与T2间的并发操作存在的问题是 (1) 。T2与T3间的并发操作存在的问题是 (2) 。时间T1T2T3t1t2t3t4t5t6t7t8t9t10t11t12t13t14t15读D1=50读D2=100读D3=300x1=D1+D2+D3读D1=50读D2=200读D3=300x1=D1+D2+D3验证不对读D2=100读D3=300D2=D3-D2写D2读D2=100D2=D2+50写D2 1.()