A:Na2O2中氧元素的化合价是-2
B:乙醇的分子式:CH3CH2OH
C:16S的结构示意图:
D:甲烷的结构式为:
马克思认为:“立法者应该把自己看作是一个自然科学家,他不是在制造法律,不是在发明法律,而仅仅是在表述法律。”对这句话的理解,最准确的是( )
It's six o'clock in the afternoon. It's time for 1!Jenny and Li Ming are2. Jenny's mother is 3 in the kitchen. Jenny and Li Ming help Mrs. Smith 4 the vegetables. After dinner, Mrs. Smith washes the 5 dishes. Li Ming dries the dishes.
爱因斯坦曾经说过:“哲学要是不同科学接触,就会变成一个空架子;科学要是没有哲学,就是原始的混乱的东西。”据此回答下题。
— Excuse me, Dad, but I'm going to the club to meet my friends in the football team.
— Ok. _____.