【单选题】Do you think __________ a math test next week?
C.
there will be D will there be
【简答题】We students enjoy our school life, but sometimes we feel unhappy.It’s every student’s dream. At the of every term, we have six exams. Last week, I finished my final exams. The math exam was the easies...
【单选题】听力原文:W: Hello, Jack! Do you think you can give me a lift to the station? I must go there to pick my sister. M: I'm terribly sorry, but I can't. I have to be at work by 8:30. I can call you a taxi, tho...
A.
Asking for information.
B.
Asking for an apology.
【单选题】动臂锁定阀的作用是( )。
D.
动臂滑阀在中位时,防止其内部泄漏而使动臂在自重或外力作用下产生下沉过快的现象
【判断题】KMeans算法的基本思想是:选择样本空间中k个样本(点)为初始中心,然后对剩余样本进行聚类,每个中心把距离自己最近的样本“吸引”过来,然后更新聚类中心的值,依次把每个样本归到距离最近的类中,重复上面的过程,直至得到某种条件下最好的聚类结果。
【单选题】如图,将△ABC沿着点B到C的方向平移到△DEF的位置,AB=10,DO=4,平移距离为6,则阴影部分面积为( )
【简答题】如图,在10×10的正方形网格中,每个小正方形的边长均为1个单位.将△ABC沿着BC翻折得到△DBC,把△DBC向下平移3个单位得到△D 1 B 1 C 1 ,再把△D 1 B 1 C 1 绕点C1顺时针旋转90°得到△D 2 B 2 C 2 .请你分别画出△DBC、△D 1 B 1 C 1 和△D 2 B 2 C 2 (不要求写画法)