问题
选择题
— I did really well in the examination, Li Ke.
— I did ______. I got full mark.[ ]
A. no less
B. no worse
C. not worse
D. not less
答案
答案:B
— I did really well in the examination, Li Ke.
— I did ______. I got full mark.[ ]
A. no less
B. no worse
C. not worse
D. not less
答案:B
硫酸厂在生产过程中会产生废气SO2,工业生产中处理SO2的方法很多,例如可以把废气通入烧碱溶液或石灰浆(主要成分为熟石灰)中.
(1)下表列出了近期熟石灰和烧碱的市场价格,从节约成本的角色考虑,使用______(填“熟石灰”或“烧碱”)更经济.
每千克的价格(元/千克) | |
熟石灰 | 0.8 |
烧碱 | 1.8 |