下列Python程序段运行后,变量b的值是( )a = 1b = 2while a<b: b = a * b a = a - bprint (b) A . 0 B . 2 C . 3 D . -2 答案:DWhen I got there,I walked along a winding path,listening to birds sing,watching children ________ toy sailboats in a huge fountain. A.trick B.wipe C.float D.slim