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I was doing my homework while my parents were ______ (cook)dinner.
11个月前
这座高塔是中空的。( )一个人一旦达到它的顶端,就会掉下来摔得粉身碎骨。( )任何人都很难从那样的高度摔下来。
1年前
If you want to eat more __________(health), you should eat less meat and more vegetables.
1年前
1年前
已知二次函数f(x)=ax^2+bx(a,b为常数,且a不等于0),满足条件:f(2)=0,且方程f(x)=x有两个相等的实根(1)求f(x)的解析式
1年前