下列计算中,正确的是 [ ]
A、3x+5y=8xy
B、3y2-y2=3
C、15ab-15ba=0
D、7x3-6x2=x
答案:C
默写。
(1 )_________________ ,帘卷西风,人比黄花瘦。
(2 )今夜偏知春气暖,_______________________。
(3)陆游《卜算子·咏梅》一词中表现了梅花高洁坚贞的品质的句子是:___________。
(4)《江城子·密州出猎》这首词中.体现作者希望北宋皇帝能够知人善任,重新起用自己的诗句是:____________________________。
(5)《观刈麦》中再现农人劳作之辛苦的句子是:________________________。
(6)《商山早行》中描写了秋天清晨之清净的句子是:_________________________。
-Look at these stamps. I __________ them for three years.
-Wow, they are so wonderful.
A. kept
B. have kept
C. have bought
D bought