A:②③
B:③④
C:①③
D:②④
根据能量守恒定律,以下情形可能发生的是( )
参考词汇:Saturday, Sunday, morning, afternoon, evening…
do homework, watch TV, go hiking, play sports, go camping, ride a bike, take pictures, clean the room, wash the clothes …
Monday, June 6th
I was busy last weekend. On Saturday, I
猜一猜
很字两人离,木棍左边立。____
口号是历史的浓缩,从口号中我们可以直观地看到一个真实的历史.“打倒一切”、“造反有理”、“停产闹革命”这类口号出现在( )