A:Have a nice time
B:Good luck
C:Come back soo
D:Congratulatio
被除数是10000,除数是28,商是356余数是32.
In the bookshop, a reader asked the shopkeeper __________ Who Moved My Cheese was an interesting book.
138×7=____
已知椭圆E: x2a2+y2b2 =1(a>b>0)的两个焦点与短轴的一个端点是直角三角形的3个顶点,直线l:y=﹣x+3与椭圆E有且只有一个公共点T.