藻井含有五行以水克火,预防火灾之义。
参考答案:对
内部关系,是指公安机关内部上下级之间、同级与同级之间、警种与警种之间,按照( )构成的关系。
A.职务高低
B.级别不同
C.一定规则
D.警衔高低
The large size and roughly circular shape of the Pacific made some scientists think that it () a hole left when the moon separated from the earth.
A. used to be
B. would have been
C. might have been
D. should have been