判断题 汆制的菜肴必需要求原料新鲜？

单项选择题 实验用超滤器不包括哪种类型？

单项选择题 Glenn Holland was a talented musician and composer who was also a professional musical performer. Why did he accept a teaching position at John F. Kennedy High School?A.Because he was tired of composing music.B.Because he wanted to enjoy more free time with his young wife, Iris, and compose a piece of orchestral music.C.Because his son Cole was born deaf, Glenn Holland wanted to teach his son by himself.D.Because his wife Iris thought he would be a good teacher instead of a good composer.