A:溶酶体和高尔基体
B:中心体和高尔基体及内质
C:核糖体和中心体
D:核糖体、内质和高尔基体
Mr. Liu is a ____. He works in Bao'an People's Hospital. His house is ____ from the hospital. So he goes to work by ____.He is ____. He helps lots of sick people. He likes his ____.
如图表示同一只手遇火时产生缩手反射的过程模式图,请据图回答:
学习是我们一生的责任和义务,是我们成长的重要内容和必要支持。( )