黄体酮的专属反应为
A．与硫酸的反应B．斐林反应C．硝酸银反应D．异烟肼反应E．与硝普钠(亚硝基铁氰化钠)的反应
参考答案：E
Mr. Zheng is such a ________ person that he has donated much money to the schools in his hometown.[ ]
A. selfish
B. patient
C. humorous
D. generous
A．(A) Because he could avoid being killed by the H-bomb.
B．(B) Because he had a new world to fight for.
C．(C) Because he was able to enjoy a pollution-free life.
D．(D) Because he succeeded in setting up his own business.
