—How ________ for one apple?
—One yuan.[ ]
A. much
B. many
C. long
答案：A
下列运算正确的是（ ）
A．x3•x2=x5
B．（x3）3=x6
C．x5+x5=x10
D．x6-x3=x3
问事元应知的业务知识有哪些？
