【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 [ ]
【简答题】Shut down the computer when we are through with it; put it ———— when we leave it for a while.
【单选题】下列各式中计算结果等于2x 6 的是 [ ]