SOLUTIONS TO TEXT PROBLEMS 7.1 (c)Carbon-2 is a stereogenic center in 1-bromo-2-methylbutane, as it has four different substituents: H, CH, CH,CH2, and BrCH2. H BrCH2-C-CH2CH, CH3 (d) There are no stereogenic centers in2-romo-2- me. Br CH:-C-CH,CH3 CH, 7.(b) Carbon-2 is a stereogenic center in 1, 1, 2-trimethylcyclobutane

Read these sentences and the following job description. ech sen Which position does each sentence 1-7 describe? For each sentence, mark one letter A, B, C or D on your answer sheet

1 Warming-up 2 Reading A 3 Reading B 4 Listening & Speaking 5 Writing 6 Mini-project 7 Language Lab

一、单项选择题 1.b2.a3.c.d5.c6.a7.b.a.c10.d11.D 二、多项选择题 1. CE 2. AC 3. ABCDE 4. ABCD 5. BCD 6. ABCDE 7.ACD

2003-2004学年第一学期概率论与数理统计(B)期末考试试卷答案 一(本题满分35分,共有5道小题,每道小题7分) 1.掷2颗均匀的骰子,令: A=m4 },B=m

The ethnographic reality behind these concepts Potlatch 1. The Culture a. North West coast cultural area is mostly in Canada b. Whole series of related groups all the way up to Alaska C. Fascinating area

7.1数据库安全 计算机系统的三类安全问题:技术安全管理安全,政策法律 1985 DOD Trusted Computer System Evaluation Criteria)) TCSEC将系统分为四组七个等级:D,(c,c2)(b1,b2,b3)a

习题1集成开发环境和程序设计入门 一、单项选择题 1C2A3D4A5C6C7B8C9D10B(ba是一种Ms-OS的批处理文件) 二、填空题 1..frm,.vbp 2. Picture, LoadPicture 3.对象,事件驱动 4. Enabled, True, False 5. Visible,True,False 6. Form=Forml. frm, Form=FrmXXX.frm

一、单选题 1.d2.b3.c4.c5.a6.b7.d8.c9.d10.A 二、多选题 1. ABD 2. BD 3. ABC 4. BCD 5.ABCD 三、判断题 1.对2.对3.对4.错5.错6.错7.错8.错9.错10.对

7.2节要点: 1.属性文法(语法制导的定义)(Syntax-Directed- Definition)。 形式:每个产生式A→a对应与之相关联的一个语义规则(semantic rules) 集合,每条规则形如b:=f(C1,2,k),其中f是一个函数,bc1C2k是该 产生式中文法符号的属性(attributes),b有两个可能:(1)是A的综合属性 (synthesized attribute),(2)是a中文法符号的继承属性(inherited attribute) 函数f通常以表达式的形式出现