题目

At the age of ten, I hated (憎恨) a girl. She liked to point out my shortcomings (缺点). Week by week, her list grew: I was very thin; I wasn’t a good student; I talked too much; I was lazy and so on. Finally, I became very angry. I cried and ran to my father.After listening to me, he asked, “Are the things she said true or not? Lyn, do you ever think what you’re really like? Well, you now have that girl’s opinion (意见). Go and make a list of everything she said and see what are true.”I did as he told me. To my great surprise, I found that half the things were true. I couldn如下图所示，用燕麦胚芽鞘做实验，可使其发生向右弯曲生长的是（    ）