在陆地五种地形中,地面起伏小、海拔较高、边缘比较陡峻的是( )。
“乳房生物反应器”是指人类通过对某种动物(如牛、羊)的( ) 进行改造,使这些动物的乳房可以产生和分泌人们所需要的某些物质
—Yes, we've got black flowers.
请根据所给的词结合上下文的意思在下面短文的空格中填上适当的单词。
I am Liu Yun. I ____ in China. I like ____, ____ and ____ my bike. I have a new friend. She is Alice. She ____ ____ model ( 模 型) ships and ____ kites. Her father ____in a school. He is a teacher. He ____ to work ____ bus.