it's the right time to study when you are young.
一定采纳哈!
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- 1英语,音标/z/
- 2修一条路,如果每天修100米,可以比计划提前3天完成,如果每天修80米,就要比计划延迟2天,这条路长多少米
- 3若函数f(x)=ax/x+1在(2,无穷大)上为增函数 ,求实数a的取值范围,
- 4what does he do now 与what is he doing now?有何区别?
- 5填空题:真分数比1小,假分数比1大.
- 6young people should help ___people 要三个字母的
- 7已知a~+b~+2a-4b+5=0,求2a~+4b+2000的值
- 8'When you have one eye on the goal,you only have one eye on the path
- 9设不等式x2-2ax+a+2小于等于0,对x属于[1,4]恒成立,求实数a的取值范围
- 10把四个棱长为1厘米的小正方体拼成一个长方体,长方体的表面积是( )