【单选题】The same one word may have more than one meaning. This is what we call ______.
【单选题】B The word “day” has two meanings. When we talk about the number of days in a year, we are using “day” to mean 24 hours. But when we talk about day and night, we are using “day” to mean the time betwe...
【单选题】If we analyze the meaning of the word 'boy' into[HUMAN],[YOUNG],[MALE], we are using the approach of______.
【简答题】如图,在平面直角坐标系中,直角梯形 的边 落在 轴的正半轴上,且 ∥ , , =4, =6, =8.正方形 的两边分别落在坐标轴上,且它的面积等于直角梯形 面积。将正方形 沿 轴的正半轴平行移动,设它与直角梯形 的重叠部分面积为 。 小题1:(1)分析与计算: 求正方形 的边长; 小题2:(2)操作与求解: ①正方形 平行移动过程中,通过操作、观察,试判断 ( >0)的变化情况是 ; A.逐渐增大...
【简答题】在平面直角坐标系xoy中,已知△ABC和△DEF的顶点坐标分别为A(1,0)、B(3,0)、C(2,1)、D(4,3)、E(6,5)、F(4,7)。按下列要求画图:以点O为位似中心,将△ABC向y轴左侧按比例尺2:1放大得△ABC的位似图形△A 1 B 1 C 1 ,并解决下列问题: (1)顶点A 1 的坐标为( ),B 1 的坐标为( ),C 1 的坐标为( ) ; (2)请你...
【简答题】求通过点(0,2,4) 且与两平面x+2z=1,y-3z=3 平行的直线方程。
【单选题】The same one word may have more than one meaning. This is what we call ______.
【简答题】The word “conservation” has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such a good condition that others may also share the enjoyment. Our forefathers h...
【判断题】Connotative meaning of a word refers to the primary meaning of the word that we often use to label things.
【简答题】在平面直角坐标系xOy中,已知△ABC和△DEF的顶点坐标分别为A(1,0)、B(3,0)、C(2,1)、D(4,3)、E(6,5)、F(4,7)。按下列要求画图:以点O为位似中心,将△ABC向y轴左侧按比例尺2:1放大得△ABC的位似图形△A 1 B 1 C 1 ,并解决下列问题: (1)顶点A 1 的坐标为 ▲ ,B 1 的坐标为 ▲ ,C 1 的坐标为 ▲ ; (2)请你利用旋转、平移两种变...