在平面直角坐标系中,点A(-1,0)与点B(0,2)的距离是______.
点A(-1,0)与点B(0,2)的距离是:(-1-0)2+(2-0)2=5.
故答案填:5.
His speech was extremely boring that it was ______interrupted by applause and cheers.
A.constantly
B.ever
C.seldom
D.even
常累及骨质,有明显骨质增生的是()
A.胶质瘤
B.脑膜瘤
C.脂肪瘤
D.血管母细胞瘤
E.听神经瘤