“如果全中国人手拉手站成一排,能环绕地球赤道40多圈”。这句话说明( )
A:我国人口增长过快
B:我国人口分布不均
C:我国人口数量大
D:我国劳动力资源丰富
如图,二次函数y=x2+px+q(p<0)的图象与x轴交于A、B两点,与y轴交于点C(0,﹣1),△ABC的面积为 54 .
一 Could you tell me ? I must find him.
一Sorry, I'v no idea. But he was here just now.
—I think students should have mobile phones to call their parents.
—________. They often use them to play games instead.