【单选题】We can put the napkin _______ when we want to leave the table for a while.
【单选题】Jim suggested that their Christmas gifts ___ and kept a while.
【单选题】对于式子(-3) 6 与-3 6 ,下列说法中,正确的是( )
【单选题】下列算式中,结果不等于6 6 的是 [ ]
【单选题】如果两个有理数的商等于0,则( ) A. B. C. D. 2.下列运算错误的是( ) A. 3 1 ÷(-3)=3×(-3) B.-5÷(- 2 1 )=-5×(-2) C.8-(-2)=8+2 D.0÷3=0 3.mn为相反数,则下列结论中错误的是( ) A.2m+2n=0 B.mn=-m2 C.|m...
【简答题】Shut down the computer when we are through with it; put it ———— when we leave it for a while.