Ames test是利用his-的________突变来检测环境或食品中的被测物质是否具有________。

下列哪种实验可用来检测致癌物质？( )

What’s in our DNA, as a social animal, is the interest in looking at alpha males and females; the ones who are important in the pack. As a social animal, man is born with an innate interest in ______________________ _________________________________________________________________________________.

可用来测试DNS配置的是（）。

What the chairman said did not ________ much to his advantage; his statement can be only considered as a slim chance for gaining approval.

his part is to test your ability to do practical writing. You are required to write a Letter of Invitation according to the following information given in Chinese. 请以李明的名义给Prof. Johnson写一封邀请信。邀请他参加由南京中医大学(Beijing University of Traditional Chinese Medicine)发起的(sponsored)传统中医治疗学(therapeutics)学术(academic)会议。该会议将于2016年11月1日在南京举行。请告知Prof. Johnson以下内容： 旅馆食宿费用将由我方承担 机票费(air fare) 由Prof. Johnson本人承担 如果Prof. Johnson有想要宣读的论文(paper) 或议题(topics)，请尽快告知我方，因为议程(program)很快就要定下来了。 请Prof. Johnson尽早确认是否参会。

原生质体融合育种已实现了多种微生物在株间、________甚至________的融合，从而成为微生物育种新工具。

基因工程又称为__________或体外__________。

基因工程改造后的菌株和动植物分别被称为__________ 和 _____________动植物。