通读全文，根据对短文的理解，选择正确的答案填空。    

    My name is Tony. I'm1  English boy. I'm twelve years old. I'm a  2 . Jim is my good friend. He3 from the USA. We are in 4  class. He's twelve years old,  5 . I have a nice  6 . Now, look  7  my photo. Jim has a long face, small eyes, brown and short hair. And the boy in a yellow cap is me. Yellow is my favourite 8 . Jim has a  9 . Her name is Kate. She is ten years old. Kate has a round face and  10 eyes. They look different.

设$\overrightarrow{a}$与$\overrightarrow{b}$是两个不共线向量，且向量$\overrightarrow{a}$+$\lambda$$\overrightarrow{b}$与﹣（$\overrightarrow{b}$-2$\overrightarrow{a}$）共线，则实数λ的值等于（　　）

蚕豆幼苗的根尖吸收水分和无机盐的主要部位是（   ）

植物叶片中不含叶绿体的细胞是（     ）