选出你所听到的句子( )
A:Do you know how to improve our memory?
B:Can you help me improve my memory?
C:Do you want to improve your memory?
甲、乙两个小组对蜡烛燃烧分别进行了如下探究,请完成下列实验报告.
经过圆(x﹣2)2+y2=1的圆心且与直线2x﹣y+1=0平行的直线方程是( )
若a=0.32,b=﹣3﹣2,c=(﹣ 13 )﹣2,d=(﹣ 13 )0,则( )