【单选题】在被子植物体内,起输导水分和无机盐作用的是
【单选题】There is no doubt ____ we will host the 2010 World Expo successfully.
【判断题】We have used molecular computers to solve more sophisticated problems successfully.
【单选题】We start to understand that trading successfully is going to take more time and more knowledge than we______.
【单选题】If we ______ develop the world successfully, we must make sure that everyone is able to take part in the new world we create. [ ]
【简答题】微分方程是【____(2字)】过程,本专题建模目的是研究【____(2字)】充分长以后过程的变化趋势 --平衡状态,是否【____(2字)】!
【简答题】判断题 (1)海带有根起固定作用,所以它不是藻类植物.______ (2)在植物学中,种皮指果实中子房壁发育成的皮.______ (3)在绿色开花植物体内,运输水分和无机盐的是导管.______ (4)桃树和人体的结构层次组成是一样的______ (5)被子植物的种子比裸子植物的种子得到了更好的保护______.
【简答题】被子植物____起输导水分的作用,____起机械支持的作用。