A.用猛火加热
B.给容器加密封盖子继续加热
C.减少水的质量
D.给容器加盖后,将瓶内水上方空气抽出一部分
答案:B
将抛物线y=3x2向左平移2个单位,再向下平移1个单位,所得抛物线为( )
A.y=3(x-2)2-1
B.y=3(x-2)2+1
C.y=3(x+2)2-1
D.y=3(x+2)2+1
In relation to the law of obligations:
(a) Define what is meant by the term ‘pledge’. (2 marks)