如图,若AB=AC,只需补充____,就可以根据“SSS”证明△ABD≌△ACD.
—Can I call you back at two o'clock this afternoon?
—I'm sorry, but by then I ____(fly) to Beijing. How about five?
某鱼塘有150m3的水,计划把旧水抽干后换新水,已知抽水机每小时抽水x m3,共用y小时,则y与x的函数关系为____ .
新疆瓜果特别甜的主要原因是( )