题目

下列运算中，正确的是 A.x3+x3=x6   B. x3·x9=x27  C.(x2)3=x5  D. xx2=x－1 答案：.DMy grandpa lives in a small village ________ , but he doesn't feel _____. [　　] A．alone;lonely B．lonely;alone C．alone;alone D．lonely;lonely