皮皮学，免费搜题
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【单选题】
数据模型是数据库系统的核心和基础，Oracle数据库属于（）。
A.
关系模型
B.
层次模型
C.
网状模型
D.
面向对象数据模型（OO模型）
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举一反三
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I did nothing but study
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【单选题】--- But how was your visit to our test facility yesterday? --- ________________________.
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B.
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【简答题】Repeating _____ he had already told the court, the accused maintained that he was at home at the time. A. that B. what C. which D. how
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【单选题】—How was your examination? —It wasn’t very difficult,but it was__________long.
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【简答题】金属材料在生产、生活中有着广泛的应用。 (1)下图标出家用白炽灯泡组成的有关物质，其中属于金属材料的是____。 (2)我国是世界钨矿蕴藏量最多的国家，工业上常用黑钨矿与碳酸钠作原料制得钨酸钠(Na 2 WO 4 )，它的水 溶液可以与盐酸反应得到不溶性的钨酸(H 2 WO 4 )， 此反应的化学方程式为_____________________，钨酸受热可以得到纯度较高的三氧化钨(WO 3 )；...
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【单选题】Which of the following statements about Doctor David Ho is correct?
A.
He was Time magazine's man of the year in 2006 for his achievement.
B.
He's a scientific director for AIDS Treatment at Rockefeller University.
C.
He was the lead researcher in the new study against AIDS.
D.
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【单选题】听力原文：(A) He's speaking into a microphone. (B) He's talking on the telephone. (C) He's holding a teleconference. (D) He's using a microwave oven.
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【单选题】Ho would the man feel if he found his book in a secondhand bookstore?
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【单选题】--- But how was your visit to our test facility yesterday? --- ________________________.
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【简答题】Repeating _____ he had already told the court, the accused maintained that he was at home at the time. A. that B. what C. which D. how
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【单选题】—How was your examination? —It wasn’t very difficult,but it was__________long.
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查看完整题目与答案
【单选题】Which of the following statements about Doctor David Ho is correct?
A.
He was Time magazine's man of the year in 2006 for his achievement.
B.
He's a scientific director for AIDS Treatment at Rockefeller University.
C.
He was the lead researcher in the new study against AIDS.
D.
He was skeptical of the results of the new study.
查看完整题目与答案
【单选题】听力原文：(A) He's speaking into a microphone. (B) He's talking on the telephone. (C) He's holding a teleconference. (D) He's using a microwave oven.
A.
B.
C.
查看完整题目与答案
【单选题】Ho would the man feel if he found his book in a secondhand bookstore?
A.
He would feel insulted.
B.
He would feel very sad.
C.
He would be embarrassed.
D.
He would be disappointed.
查看完整题目与答案