听力原文: Police in London now say that more than 50 people died in yesterday's terrorist bombings and warn that the death toll could rise. Police also said that there were no more than four explosive devices involved, three on underground trains and one on a bus, and they estimated that all the bombs were relatively small containing about 10 pounds of high explosive. Commissioner Blair also denied there was any evidence to suggest that the attacks were carried out by suicide bombers but said the possibility could not be ruled out. Police said they received no warning about the attacks and would not speculate on a claim by a group calling itself "The Secret Organization of A1-Qaida in Europe" that it was behind the bombings.
We know for sure that _______.
A.50 people died in the terrorist bombing
B.there were four explosive devices involved in the terrorist bombing
C.the attacks were not carried out by suicide bombers
D.The Secret Organization of A1-Qaida will not be speculated on by London Police
第1题
(l)对于现实世界中事物的特征,在实体一联系模型中使用 A) 属性描述 B)关键字描述 C)二维表格描述 D)实体描述
第4题
对于现实世界中事物的特征,在实体一联系模型中使用______。
A.属性描述
B.关键字描述
C.二维表描述
D.实体描述
第5题
对于现实世界中事物的特征,在实体一联系模型中使用______。
A.属性描述
B.关键字描述
C.二维表描述
D.实体描述
第6题
对于现实世界中事物的特征,在实体一联系模型中使用______。
A.属性描述
B.关键字描述
C.二维表描述
D.实体描述
第7题
对于现实世界中事物的特征,在实体—联系模型中使用______。
A.属性描述
B.关键字描述
C.二维表描述
D.实体描述
第8题
对于现实世界中事物的特征,在实体—联系模型中使用______。
A.属性描述
B.关键字描述
C.二维表描述
D.实体描述
第9题
对于现实世界中事物的特征,在实体一联系模型中使用()来描述。
A.属性
B.实体
C.关键字
D.二维表格
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!