题目

Two and a half years ago, my son started to cry because of his bad grades at school. He was only nine years old at the time and had always been one of the ______ students in his class. So he sat there at the table, so sad. He said that he wished that he were a strong student and were able to ______ Gymnasium, a very good school for the strongest students, starting at the age of 12 or 13. I didn't really want to weaken (动摇) him _______telling that, You may not be strong enough for this school. With Bob Proctor's words in my eyes Make your kids see A grades, I said, Yes, you ______, if you r将小麦种子浸泡在红墨水中10 min后，取出剖开，发现胚为白色，胚乳为红色，这说明 （ ）A. 胚已死亡，胚乳成活 B. 胚和胚乳均成活C. 胚成活，胚乳已死亡 D. 胚和胚乳均死亡