问题 问答题

诱导物(inducer)

答案

参考答案:一种化学因子或物理因子,当作用于细胞群体时,会增加特定基因的转录量。例如,异丙基硫代-β-半乳糖苷(IPTG)是lac操纵子的有力诱导物。

写作题

现在shopping on line(网上购物) 已经成为一种时尚,特别是年轻人特别喜欢在网上购物。 你对shopping on line 有什么看法呢?请你谈一谈。(60—70词)。

参考词汇: the quality of the product  , cost less money , convenient , save time , get our money back , lead ….

Shopping On Line

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

                                                                    

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