①生产决定消费的方式
②生产以消费为导向
③消费是生产的最终目的
④生产是消费的动力
A:①③
B:①④
C:②③
D:②④
He __________ goes to Tai'an, so he wants to go there.
There is _______ wrong with my back and it hurts seriously.
某温度下,体积和pH都相同的盐酸和氯化铵溶液加水稀释时的pH变化曲线如图所示,下列判断正确的是( )