来自小圆子01的问题
老师，你好！麻烦你帮我看一下这个句子有没有语法错误：The nutritive tissue tha
老师，你好！麻烦你帮我看一下这个句子有没有语法错误：The nutritive tissue that is derived from the nucleus and surrounds the embryo of the seed.
1回答
2016-05-17 11:08