作用

34．About seven years ago she felt she had to ask herself____she really wanted to spend her life farming. Now she has make up her mind to quit farming.

A．when

B．whether

C．what

D．where

It is requested that every student            (求助于)the dictionary while having difficulty in reading.(turn)

元件的有哪些类型（）

A：图形元件

B：影片剪辑

C：按钮

D：对象绘制

简述大豆的高产栽培技术。