2005年12月全国大学英语四级考试真题和答案 Part I Listening Comprehension(20 minutes) Section a 1. A)See a doctor. B Stay in bed for a few days. C)Get treatment in a better hospital D)Make a phone call to the doctor. 2. A)The 2: 00 train will arrive earlie B)The 2: 30 train has a dining car

2004年6月全国大学英语四级考试真题和答案 Part I Listening Comprehension(20 minutes) Section a Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked

2003年9月全国大学英语四级考试真题和答案 Part I Listening Comprehension(20 minutes) Section a Directions: In this section, you will hear 10 short conversation. At the end of each conversation, a lestion wilt be asked about what was said. Both the conversation and the question will be spoken only

2002年6月全国大学英语四级考试真题和答案 Part I Listening Comprehension (20 minutes) Section A Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked

[1]John F Marsh. Chem Indus, 1987(20): 470 纳米润滑材料研究中亟待解决的问题: 2 Whitte J.US PatP].44275591984 (1)寻找普遍可行的纳米材料制备技术,降低B] Hunt M WUS PatP148678911989 成本; [4] Inoue K U. Soc Trib Lub Eng 1993(49): 263

我国在20世纪80年代末开始研究低温多效蒸馏法海水淡化技术,初期主要是基础理论研究,到九五”期间天津海水淡化

计算机英语试题答案 一、词汇(选择一个最合适的词汇,将对应的英文字母填入空格内。每题2分,共20分) 1, B is used to communicate with another computer over telephone lines A. keyboard B. modem C. mouse D. printer

美国经常帐户在整个60年代与70年代维 持在顺差的水平,80年代经常项目总计 发生了8604亿美元的赤字,90年代则达 到了顶峰的19017亿美元的总赤字水平, 虽然每年的经常项目赤字占GDP的比重 不足5%,但1992年至2001年累计达到了 2001年GDP的20%

一、选择题 1.d2.b3.c4.d5.d6.a71c7.2a7.37.4a7.58.b 9.c10.d11.b12.e13.d14.d1.c16.b17.c18.c19.b20.d

一、填空题(每空1分,共20分) 1称为空串;称为空白串。 2.设S=“A;document/mary.doc”,则 trlen(s)= ,“的字符定位的位置为