A:①③⑥
B:①③④⑤
C:①②③⑥
D:①②③④
水是生命之源,保护水资源是每个公民应尽的责任和义务.
The team will move a speed of 15 kilometers per hour, and have a short break every 2 hours. During the break they will tell stories_______ English.
下列有关细胞中元素和化合物的叙述,正确的是( )
将抛物线y=2(x+1)2﹣2向右平移2个单位,再向上平移2个单位所得新抛物线的表达式是( )