第五讲、有机合成设计技巧(I) 一、有机合成中的保护基 二、反应性差异的利用 三、合成问题的简化 四、有机合成战略

Revision I. Expressions ss Directions: Turn the following English terms into Chinese without looking at your textbook 1. Purchase order: order sheet. order note indent

Revision: I. Expressions Directions: Turn the following English terms into Chinese without looking at your textbook 1. market slump 2. market boom 3. market share 4. market fluctuations 5. strong market

Revision: I. Expressions Directions: Turn the following English terms into Chinese without looking

替代定理一个有唯一解的网络N,若已知第k条 支路的电压和电流为v,则不论该支路是由什 么元件组成,总可以用电压为vs=V的电压源或电流为is=i的电流源替代,整个网络N的工作状态不受影响

I. Explain the italicized words or phrases in the following sentences. (20%) 1. Ancient girders creak and groan, ropes tighten and then a trickle of oil oozes down a stone runnel into a used petrol can

I. Explaining the italicized words in the following sentences. (20%) Bargaining is the order of the day, and veiled women move at a leisurely pace from shopto shop, selecting, pricing and doing a little preliminary bargaining

Part I Vocabulary(30%) Section 1 Give a synonym for each of the following words(10%). 1. would-be 2. pungent 3. oblivious 4. inhibited 5.frigid 6. wring

I. Vocabulary(30%) Section 1 Explain the underlined word or phrase in each of the following sentences. (15%) 1. A storm moved directly over the island, demolishing buildings and flooding streets. 2. The environmental problems they found in Poland were among the worst they encountered

体细胞突变是不能遗传给后代的,但是可以通过有性 途径传递。 生殖细胞突变发生在种系( germ I ine)中,如果突变的 性细胞参与受精过程,那么突变基因就会传给下一代。第一节 基因突变的时期和特征 第二节 基因突变与性状表现 第三节 基因突变的鉴定 第四节 基因突变的分子基础 第五节 基因突变的诱发