歌词:“大地在我脚下,国计掌于手中,哪个再敢多说话;夷平六国是谁,哪个统一称霸,谁人战绩高过孤家?”本歌词反映的国计掌握在谁的手中( )
A:秦始皇
B:汉武帝
C:朱元璋
D:忽必烈
如图,已知抛物线y=ax2+bx+c(a≠0)与x轴交于点A(1,0)和点B(﹣3,0),与y轴交于点C,且OC=OB.
关于声现象的下列说法中,正确的是( )
— She didn't finish my homework _____ my father came back.
— So you went to bed too late.