【单选题】Reading can increase your words. When you read, you will find words repeat (重复) _____ and build up your vocabulary quickly. [ ]
【单选题】In favor of gender-neutral terms, which of the following words can be used to describe unisex entities? ______
【单选题】从减轻重量的角度看,某二级圆柱齿轮减速箱中安装的飞轮最好安装在( )轴上。
【简答题】基因工程技术生产的目标产物是多肽和蛋白质类化合物, 这些产品有什么特点
【单选题】某交流电的最大值为 311V ,则该交流电的有效值为