【单选题】A) They are part of their nature. B) They are subject to change. C) They are related to culture. D) They are beyond control.
A.
They are part of their nature.
B.
They are subject to change.
C.
They are related to culture.
D.
They are beyond control.
【简答题】已知二次函数 的零点是-1和3,当 时, ,且 。(1)求该二次函数的解析式;(2)求函数 的最大值。
【单选题】锯条的安装锯割前选用合适的锯条,使锯条齿尖朝() ,装入夹头的销钉上
【简答题】荷载根据(__),可分为恒荷载和活荷载。
【简答题】关于二次函数学生甲有以下观点:①二次函数必有最大值;②二次函数必有最小值;③闭区间上的二次函数必定同时存在最大值,最小值;④对于命题③,最值一定在区间端点取得.你认为学生甲正确的观点序号是 ______.根据你的判断试解决下述问题:已知函数f(x)=ax 2 +(2a-1)x+1在 [- 3 2 ,2] 上的最大值为3,求实数a的值.
【判断题】荷载根据作用时间不同,可分为恒荷载和活荷载。
【简答题】已知二次函数当x=3时,函数有最大值﹣1,且函数图象与y轴交于(0,﹣4),那么该二次函数的关系式是( ).
【单选题】女性48岁,已婚,以往月经量正常,周期规则。妇科普查时发现子宫增大如妊娠8周大小,质地稍硬,两侧附件无明显异常。该病人的处理原则是
【单选题】锯条的安装锯割前选用合适的锯条,使锯条齿尖朝(),装入夹头的销钉上。
【简答题】A. They admit their mistakes. B. They are open to criticism. C. They are willing to learn. D. They’re in charge of their emotions. E. They apologize when needed. F. They are generous with compliments....