题目

The clothes are beautiful. Please ______________. ( )A. try it on B. try on them C. try them on D. try on it 答案：【答案】C【解析】略10．菟丝子的叶片退化，细软的茎缠绕在大豆的茎上，将细根伸进大豆的茎内吸收水分和养料，菟丝子和大豆之间的生物关系是（　　）A．寄生B．竞争C．捕食D．互利共生