The a  小题1:  of scientists towards the rise is completely different. On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be a    小题2:    (大灾难). On the other hand, George Hambley, who is o   小题3:    to this view, predicts that any warming will be    小题4:   (温和的) with few bad environmental c   小题5:  . 

下列家庭小实验不能成功的是（　　）

A．用紫卷心菜制酸碱指示剂

B．用闻气味的方法鉴别白酒和白醋

C．用食盐水浸泡菜刀以除去表面的锈斑

D．用果汁、小苏打、柠檬酸、凉开水等自制汽水