China has made big progress in running competitions! The young1Su Bingtian made history on Sunday by becoming the2Asian athlete to appear in the men's 100m final at the world athletics championships.

    As the3man in China, Su was born in a4family in Guangdong in 1989. His parents were both farmers and had a lot of work to do on the farm every day. So Su often helped them with housework at home. Though his study was not very good, he was5at running than many other boys in his class. He6this kind of sport very much, so he practised running as often as possible. In 2004, Su started to take part in different competitions and has won many prizes since then. And this year, he managed to finish 100 metres in 9.99 7. That was the best result in Asia. His dream8! When he heard the news, he could not believe9ears.

    Though Su is famous now, he never behaves arrogantly. Instead, he still works hard10he wants to have a better chance of winning! I believe there is a lesson there.

番茄高茎（T）对矮茎（t）为显性，圆形果实（S）对梨形果实（s）为显性（这两对基因位于非同源染色体上）．现将两个纯合亲本杂交后得到的F₁与表现型为高茎梨形果的植株杂交，其杂交后代的性状及植株数分别为高茎圆形果120株，高茎梨形果128株，矮茎圆形果42株，矮茎梨形果38株．这杂交组合的两个亲本的基因型是（　　）