Finishbyputtingyour_(7)___onyourhips.One,two,threeone,two,three.One,two,threeone,two,three.

Finish by putting your_(7)___ on your hips. One, two, three one, two,three. One, two, three one, two, three.

Finish by putting your_(7)___ on your hips. One, two, three one, two,three. One, two, three one, two, three.

【单选题】28 里面有多少个 7? 列式是 () 。 A.28 ÷ 7=4 B.28 ÷ 4=7 C.7 × 4=28 A. 28 ÷ 7=4 B. 28 ÷ 4=7 C. 7 × 4=28

简便计算,（7分之5乘7分之4加7分之4）除以7分之4

Two groups of people are compared in the third study. They are people______. A: with less than5 hours of sleep a night and with 7 to 9 hours of sleep B: who slept 4 hours a night and who slept 4 hours for 2 nights C: with less than 4 hours of sleep a night and with 7 to 9 hours of sleep D: with less than 5 hours of sleep a night and with 8 hours of sleep

下面表达式中错误的是( )。 A: 7%(-4) B: 0%4 C: 7%-4 D: 7%4.0

【单选题】A=[3 4 5;4 2 6];B=[4 2 7];C=[A;B] 运行的结果为 A. [3 4 5 4 2 6 4 2 7] B. [3 4 4;4 2 2;5 6 7] C. [3 4 5;4 2 6;4 2 7] D. [4 2 7;3 4 5;4 2 6]

“4×7×250=4×250×7”是根据推出的

4×7=28，4和7是28的（）。28是4的（），也是7的（）。