问题
选择题
关于人体激素的叙述，错误的是[ ]
A．激素在人体内作为信息物而发挥作用
B．激素在人体内含量较低，但有高效的生物催化作用
C．甲状腺激素除了促进人体产热，还有其他生理效应
D．正常人体内，激素的分泌受反馈调节
答案
答案：B
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关于人体激素的叙述，错误的是[ ]
A．激素在人体内作为信息物而发挥作用
B．激素在人体内含量较低，但有高效的生物催化作用
C．甲状腺激素除了促进人体产热，还有其他生理效应
D．正常人体内，激素的分泌受反馈调节
答案：B
“Never give up!” It is my law(法则) of life. It has brought me success. I learned the law from my father's famous story. My father was in a poor village in the north of Jiangsu，in China. When he was a young boy，he went to school in the morning，then in the fields till sunset. And then he did his homework during midnight. Life was hard，because they had no ！ At the age of 14，my father heard of the United States of America. It was the land of gold，the land where people can become rich. “ don't I go to America？” he thought to himself，full of hope. So，my father came to America. “I had thought it was easy to collect money in America，” he told me. “But when I arrived there，I realized it was not true. They did not like to hire(雇佣) me because I spoke English. Later，I worked in a small restaurant，cleaning up tables， dishes and sweeping the floor. Life was for the first few years. I worked from 10 a. m. to 11 p. m. I wanted to go to school to learn English，but it was impossible. I couldn't the schooling(学费). ” My father working hard，and reached his goal. “Alan，” he often says to me. “If you want something，you have to work for it and never give up. Things do not come really in life. ” That is what I learned from my father.
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