—How is your grandma?
—She is fine. She used to____ TV at home after supper. But now she is used to____out for a walk.
为验证“掷一个质地均匀的骰子,向上的点数为偶数的概率是0.5”,下列模拟实验中,不科学的是( ).
在Rt△ABC中,∠C=90°,a、b、c分别是∠A、∠B、∠C的对边,下列等式中正确的是( )