问题
选择题
下列运算正确的是（ ）
A．x3•x2=x5
B．（x3）3=x6
C．x5+x5=x10
D．x6-x3=x3
答案
A、x3•x2=x5，故本选项正确；
B、（x3）3=x9，故本选项错误；
C、x5+x5=2x5，故本选项错误；
D、x6-x3≠x3，故本选项错误．
故选A．
搜题请搜索小程序“爱下问搜题”
下列运算正确的是（ ）
A．x3•x2=x5
B．（x3）3=x6
C．x5+x5=x10
D．x6-x3=x3
A、x3•x2=x5，故本选项正确；
B、（x3）3=x9，故本选项错误；
C、x5+x5=2x5，故本选项错误；
D、x6-x3≠x3，故本选项错误．
故选A．
Paul is a worker. One of his feet is bigger than 1 . He can’t 2 the right shoes 3 his feet. His friend, Dick, says to him, “ 4 don’t you go to a shoemaker(鞋匠) ? A shoemaker can 5 you the right shoes.” 6 Paul goes to the shoemaker near Dick’s home. Very soon the shoemaker makes him a pair of shoes. Paul 7 the shoes but he is not happy. He 8 the shoemaker, “You aren’t 9 good shoemaker！I want you to make me one shoe bigger than the other. 10 you make me one shoe smaller than the other. ”
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