【单选题】Betty spends all her income on wine and brie. Currently she gets 30 utils from the last bottle of wine and 15 utils from the last package of brie. The price of wine is $6 per bottle and the price of b...
A.
Betty cannot increase her total utility by changing the combination of wine and brie she consumes.
B.
Betty can increase her total utility by buying more wine and less brie.
C.
Betty can increase her total utility by buying more brie and less wine.
D.
Betty could increase her total utility by buying less of both brie and wine.
【简答题】蛋白质缺乏往往与____缺乏同时发生,称为____。
【单选题】2019年中央一号文件《中共中央国务院关于坚持农业农村优先发展做好“三农”工作的若干意见》中指出:要求稳定粮食产量,严守( )亿亩耕地红线,全面落实永久基本农田特殊保护制度,确保永久基本农田保持在15.46亿亩以上。
【多选题】进气歧管绝对压力传感器的常见故障有()。
【简答题】蛋白质缺乏往往与 缺乏同时发生,称为 蛋白质 。