More than 80 people ______ in the earthquake ______ last week.
A:died; for
B:have been dead ; since
C:have died; since
D:have been dead; for
下列物理量的估测中,最接近实际的是( )
在家里,我是孩子,要孝敬父母;在马路上,我是行人,要遵守交通规则;在公园里,我是游客,要爱护花草树木……这些事例说明( )