【单选题】What does the author mean by saying 'abounds with Styrofoam abuse' in Paragraph 5? 查看材料
A.
There are lots of writers using the term Styrofoam in their works.
B.
There are lots of misuses of the term Styrofoam on the web.
C.
The term is used to abuse another person on the web.
D.
The term is attacked by many people on the Internet.
【单选题】Allegory is a literary device()another
A.
vel of meaning is concealed within what is usually a story.
【单选题】1943年,美国科学家艾弗里和他的同事,从S型活细菌中提取了DNA、蛋白质和多糖等物质分别加入到培养了R型细菌的培养基中,结果发现只有加入DNA,R型细菌才能转化成S型细菌,而加入蛋白质.多糖等物质的培养基中,R型细菌不能发生这种变化.这一现象能说明的是() ①S型细菌的性状是由DNA决定的 ②在转化过程中,S型细菌的DNA可能进入到了R型细菌细胞中 ③DNA是遗传物质 ④蛋白质和多糖在该转化实验...
【单选题】细胞的转分化能力( )
A.
对于胚胎发育过程中细胞分化所具有的稳定性和不可逆性而言,是一种特例
【多选题】以下关于光亮带的说法,不正确的是:__________。
B.
当刃口切入板料后,板料与凸凹模刃口的侧表面挤压而形成光亮垂直的断面。
【简答题】已知递增等差数列 前3项的和为 ,前3项的积为8, (1)求等差数列 的通项公式; (2)设 ,求数列 的前 项和 。
【单选题】Romance is a literary genre popular among
【判断题】Tone is a literary technique that is a part of composition, which encompasses the attitudes toward the subject and the attitudes toward the audience implied in a literary work.
【单选题】()作为信息资源的集散中心,可以免费为用户提供纸质或者电子图书、光盘等信息资源的借阅服务。