题目

I came to study in the United States a year ago .Yet I did not know the real American society until I was injured in a car accident because after the accident I had to see a doctor and go to court. After the accident .my roommate called a doctor for me. I was very grateful and determined to repay him one day. But the next day, he asked me to pay him $200 for what he had done. I was astonished. He had good reason to charge me, he said. And if I wanted to collect money from the person who was responsible for my injury, I’d have to have a good lawyer. And only a good doctor can help m下列现象中属于遗传的是（ ）A．一母生九子，连母十个样B．近朱者赤近墨者黑C．龙生龙凤生凤，老鼠的儿子会打洞D．世界上找不到两片完全相同的树叶