问题
选择题
下列运算中正确的是( )
A.a2+a3=a5
B.a2×a4=a8
C.(a2)3=a6
D.a6÷a2=a3
答案
A、a2与a3不是同类项的不能合并,故本选项错误;
B、应为a2×a4=a6,故本选项错误;
C、(a2)3=a6,正确;
D、应为a6÷a2=a4,故本选项错误;
故选C.
下列运算中正确的是( )
A.a2+a3=a5
B.a2×a4=a8
C.(a2)3=a6
D.a6÷a2=a3
A、a2与a3不是同类项的不能合并,故本选项错误;
B、应为a2×a4=a6,故本选项错误;
C、(a2)3=a6,正确;
D、应为a6÷a2=a4,故本选项错误;
故选C.
完型填空。 Look at the boy. He is __1__ good friend. He is __2__ American boy. __3__ name is Tom. __4 _ 12. My _5_ is Wang Lei. __6__ a Chinese boy. I'm 13. Tom _ 7__ a small sports collection. He has __8__ tennis racket, three basketballs and four soccer balls, But I only have __9__ baseball. Tom and I _ 10__ sports every Sunday . | ||||
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