He said he was ____ tired to walk any farther. [ ]
A. so
B. that
C. too
答案:C
生物在表现为多样性的同时也具有共性,下列特征中为生物最基本的特征的是[ ]
A.生长
B.新陈代谢
C.繁殖
D.应激性
以下电子排布式是基态原子电子排布式的是( )
A.1s12s1
B.1s22s22p63s23d1
C.1s22p1
D.1s22s22p1