一年中有______个季度，今年的第一季度有______天．
一年中有四个季度，今年的第一季度有：31+28+31=90（天）；
故答案为：4，90．
Nobody knows the man killed in the accident, so it is difficult for the police to find out his _____.
A．identity
B．height
C．weight
D．thought
将下列地理区域与所属的区域类型连线。
