自考英语（二）60讲 Lesson 54
时间：2018-12-15 作者：英语课 分类：自考英语（二）60讲
英语课
本讲为2006年下半年新的教学内容，请对照教材、练习册和语法书听录音！
1. Data from previous animal experiments is used to develop a computer model which will predict what will happen if you add a chemical with an unknown biological effect to a substance.
The purpose is _to increase_ (increase) the profit.
Not until
I will not begin until 8.
I will wait for you until 8.
Many other new techniques that enable 1 more research to be done in the test tube to see if chemicals produce harmful biological effects are now available.