(1)(2)B(3)D (4)D (5)B 6)b(7) (8)B (9)D(10)D (11)(12)B(13)B(14)C(15)A

Compounding is a process of word formation by which two independent words are put together to make one word. The word formed in this way is c a lled co mpo und

一、填充题:(共10小题,40空,每空0.5分,共20分) 1、珠宝必须具备的条件是 和 2、晶体的基本性质是 和 3、钻石的评价标准“4C”指的是 和

PHYSICAL PROPERTIES TABLE A Selected Physical Properties of Representative Hydrocarbons Boiling Molecular Structural Melting Compound name formula point,C Alkanes Methane 182.5 Ethane CH CH3CH3

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

一、选择题: 1若有以下说明和语句,且0