02-01-05一级考试选择题(S) 1、目前微型计算机所采用的CPU() A)不仅是Intel和与其兼容的CPU B)都是Intel和与其兼容的CPU C)都是Intel公司生产的CPU D)都是Pentium CPU 2、衡量计算机硬件系统的主要性能指标中不包括() A)字长 B)主存容量 C)主频 D)操作系统性能 3、八位无符号二进制整数的最大值对应的十进制数为() A)255B)256C)511D)512

1. You still have a lot _if you'll forgive my A)to learn/saying B) learning/saying C) learningto say D) to learn/to say 2. There is no point to persuade him to do anything A)to try B)in trying C)of trying

Notes LECTURE Biochemistry 9.17.04 ATP is both a unit of energy currency in a cell and a building block of RNA. Why? It is believed that early in evolution there were very few molecules around. Many key pathways are ancient, and trace their origin to the early stages of evolution of life on Earth. Incidentally, such pathways are usually highly conserved in modern organisms. This is probably because once

Bob, a student taking 7.012, looks at a long-standing puddle outside his dorm window Curious as to what was growing in the cloudy water, he takes a sample to his TA, Brad Student. He wanted to know whether the organisms in the sample were prokaryotic or eukaryotic

5-1 MCS-51单片机最小系统 5-2 存储器的扩展 5-4 可编程并行接口芯片8255A 5-6 常用通道配置与接口技术 5-7 D / A转换 5-3 并行I / O端口的扩展方法 5-5 可编程并行接口芯片8155 5-8 A / D转换

一、选择题 （1）B） （2）D） （3）C） （4）A） （5）D） （6）B） （7）A） （8）B） （9）C） （10）D） （11）A） （12）D） （13）C） （14）B） （15）D） （16）B）

Many intracellular proteins are required to interact or bind to other macromolecules within a bind DNA. Such proteins often have conserved structural features, called motifs, whis at can cell in order to function properly. One class of such proteins is comprised of proteins tha interact with DNA. One such motif consists of two closely aligned a-helices(shown as cylinders below)that each have leucine-rich regions. This motif is referred to as a leucine

Cheese is a very varied group of dairy products, produced mainly in Europe, North and South America, Australia and New Zealand and to a lesser extent in North Africa and the Middle East, where it originated during the Agricultural Revolution, 6000-8000 years ago. Cheese production and con- 10A and 10B), is increasing in traditional

4.7.I Occurrence and microheterogeneity B-Lactoglobulin is a major protein in bovine milk, representing about 50% of total whey protein and 12% of the total protein of milk. It was among the first proteins to be crystallized, and since crystallizability was long considered to be a good criterion of homogeneity, B-Ig, which is a typical

一、选择题 （1）D） （2）A） （3）C） （4）B） （5）D） （6）C） （7）D） （8）B） （9）B） （10）A） （11）A） （12）C） （13）D） （14）B） （15）B） （16）D） （17）B） （18）B） （19）C） （20）D） （21）