【判断题】在三次甲基甲烷分子中, 中心 C 原子与邻近三个次甲基组成大 p 键。中心 C 原子的键级为 4.732。
【简答题】“守株待兔”的故事中农夫的错误从哲学上讲是( )。
【单选题】“守株待兔”的故事中农夫的错误从哲学上讲是
【简答题】“守株待兔”的故事中农夫的错误从哲学上讲是( )。
【单选题】不属于体内氨基酸代谢产生的一碳单位的是:
【单选题】How did Daniel get Stephen out of danger?
A.
He squeezed into the car and carried him out.
B.
He pulled him out through the broken window.
C.
He freed him free his seatbelt before he got him out.
D.
He held him over the water and swam back to shore.