——Would you like to visit the new museum with us this Sunday?——____________, but I will have to work then.
A:No, I can't
B:I wouldn't
C:I'd love to
D:Yes, I'd like
若椭圆x2a2+y2b2=1(a>b>0)与双曲线3x2a2﹣3y2b2=1共焦点,则双曲线的渐近线方程为( )
①化肥等农资价格上涨→农民种植玉米的积极性下降
②养殖企业缩小规模→作为饲料的玉米的需求量减少
③玉米种植面积扩大→国家实施玉米临时收储政策
④国际市场玉米价格下降→我国玉米进口数量增多
揭开维新变法运动序幕的历史事件是( )