电影《英雄》中，无名(刺客)对秦王说：“剑”字有18种写法，互不相同（通）。秦王说：统一以后要将这些杂七杂八的文字一律废掉，只留一种文字。
下图示溶酶体(一类含多种水解酶、具有单层膜的囊状细胞器)发生过程和“消化” 功能的示意图，c为膜包裹的衰老细胞器线粒体，分析判断下列结论错
What is the book made of? What we read books or newspapers，we hardly stop to think about the paper which is used to make them. Without this invention，our lives would be very different. Paper is
５.以下能够表达碳原子与生物大分子之间关系的是 A．碳原子→碳链→多聚体→单体 B．碳原子→碳链→单体→多聚体 C．碳原子
- Was Eric’s father very strict with him? - Yes. He never praised him he became one of the top students in his grade. A. since B. when
(本小题满分12分) （1）设，求和； （2）设，求的值。
下列物质在光照条件下，能发生化学反应的是( ) A.HCl B.KCl C.H2和Cl2混合物
In1994, China began collecting income tax from citizens earning more than 800 Yuan per month but only 1% people were earning more than _______; now about 60% earn the amount.A．thisB．theseC．tho
表示一个正整数时，整数
可取的值是 .