【单选题】设有三个角度观测值的权分别为3,4,6;则三角形内角和的权为( )。
【简答题】设函数f(x)= 3 sin2x+2cos 2 x. (1)求函数f(x)的最小正周期; (2)求函数f(x)的单调递增区间.
【简答题】设函数f(x)=a- 2 2 x +1 (1)求证:f(x)是增函数; (2)求a的值,使f(x)为奇函数; (3)当f(x)为奇函数时,求f(x)的值域.
【单选题】--- Look! __________ there are in the garden!
A.
- Let’s go there to take some photos.
B.
What a beautiful flower
C.
How a beautiful flower
E.
What beautiful flowers
【单选题】对四个三角形的全部内角进行观测,其观测值(内角和)分别为:180°00′18″、180°00′12″、179°59′48″、179°59′42″,则其观测值中误差为()。
【简答题】加工中心与数控铣床编程的主要区别是()。 (A)指令格式 (B)换刀程序 (C)宏程序 (D)指令功能
【多选题】Like any theory of importance, that of social or cultural anthropology was the work of many minds and took on many forms. Some, the best known of its proponents, worked on broad areas and attempted to...
A.
Social anthropology concerns itself with broad areas while cultural anthropology concerns itself with specific aspects of culture.
B.
Cultural anthropologists, also known as social anthropologists, may work in either broad or restricted areas.
C.
Cultural anthropology is a new field of study.
D.
Any important area of study requires the work of many minds and is therefore likely to have different approaches.
E.
The best-known people in cultural anthropology attempted to describe the development of human civilization.
【简答题】设函数f(x)= 3 sin2x+cos2x+1 (Ⅰ)求函数f(x)的最小正周期; (Ⅱ)求函数f(x)的增区间 (Ⅲ)当x∈[- π 6 , π 3 ]时,求函数f(x)的最大最小值并求出相应的x的值.
【简答题】标记用于定义页面的元信息,可重复出现在 头部标记中, meta 的属性有两种: name 和 http- equiv 。 向搜索引擎说明网页的 。