题目

若、是等腰直角斜边上的三等分点，则__________。 答案：。过作于，则为、中点。设，则，，。introduce … to… for free donate … to…prepare … for… on average inform … of1.According to this research, ________ women live between five to seven years longer than men.2.Before I open the letter, let’s _________ ourselves _______ the news, whether it is good or bad.3.I think doctors should ________ the patients _______ the side effects of the medicine they take.4.Peter, I want to _________ you _________ my family.5.He has offered to do the job ___________.6.Do you think you are willing to ___________ some of your time ________ the volunteer work?