云锦花纹又称（）
A.五花层
B.五影纹
C.水波纹
D.云纹
E.方胜纹
参考答案：D
Peter hurried through dinner, changed into old clothes, _______ in the lab for three hours.
A．worked
B．working
C．and worked
D．to work
如果被除数与除数的比是5：3，则商与除数的比是（ ）
A．5﹕3
B．3﹕5
C．5﹕8
D．5﹕9
