已知x 0 是函数f(x)=2 x + 的一个零点，若x 1 ∈（1，x 0 ）...

皮皮学，免费搜题

搜题

【单选题】

已知x 0 是函数f(x)=2 x + 的一个零点，若x 1 ∈（1，x 0 ），x 2 ∈（x 0 ，+∞），则 [ ]

f(x 1 )＜0，f(x 2 )＜0

f(x 1 )＜0，f(x 2 )＞0

f(x 1 )＞0，f(x 2 )＜0

f(x 1 )＞0，f(x 2 )＞0

手机使用

复制链接

新浪微博

分享QQ

微信扫一扫

微信内点击右上角“…”即可分享

反馈

参考答案：

举一反三

【单选题】（）法是故意设问来表达幼儿情趣的构思方法。它能吸引幼儿的注意力，增加诗的趣味性。

假设法

拟人法

比喻法

疑问法

查看完整题目与答案

【单选题】Healthy eating is a good way to avoid suffering from heart disease.

True

False

查看完整题目与答案

【单选题】Eating fruits is good your health, because it is in vitamin.

for; short

of; low

for; short

for; rich

查看完整题目与答案

【单选题】Eating much junk food _____ your health. [ ]

is good for

is good to

is bad for

is bad to

查看完整题目与答案

【简答题】阅读理解。 Snake meat is popular in restaurants. Some people think eating snakes is good for their health. But these people don't know that snakes feed on mice and worms, so there are many parasites (寄生虫) ...

查看完整题目与答案

【单选题】Eating more vegetables is good your helth.

for

with

查看完整题目与答案

【简答题】阅读理解。 Snake meat is popular in restaurants. Some people think eating snakes is good for their health. But these people don't know that mice and bad worms are often in snakes' bodies. And we're sorry t...

查看完整题目与答案

【单选题】数控铣床的加工动作主要分刀具的动作和工件的动作两部分,因此,在确定机床坐标系的方向时规定:永远假定刀具相对于静止的工件而运动。对于机床坐标系的方向,均将( )工件和刀具间距离的方向确定为正方向。

增大

减少

增大又减小

都可以

查看完整题目与答案

【判断题】425主减速器可以实现减小扭矩的作用。

正确

错误

查看完整题目与答案

【简答题】在机床坐标系的确定中，把平行于机床主轴的刀具运动坐标定义为（）坐标，并规定远离工件的方向为正方向。