【单选题】If you want to keep fit, you should _______ [ ]
B.
learn a foreign language
【简答题】设A为5阶方阵,A*是其伴随矩阵,且|A|=3,则|A*|=_______
【单选题】– You should walk or run daily if you want to keep fit. – ______.
B.
Thanks for your advice
【简答题】You are so kind to _________ my pain. (relief)
【简答题】设 为5阶方阵, 是其伴随矩阵,且 ,则 _______
【多选题】反映本量利关系的基本公式包括( )
C.
利润=单价X销售量-单位变动成本X销售量-固定成本
D.
利润=(单价-单位变动成本)X销售量-固定成本
【简答题】设【图片】为5阶方阵,【图片】是其伴随矩阵,且【图片】,则【图片】_______
【单选题】Don't you think _______of great importance that we should keep fit by taking exercise regularly?
【单选题】Since smoking is a bad habit, to keep yourself fit,you should try to _____ it. [ ]
【单选题】(2014·湖南株洲一模)—Thank you for your tea. —You are so kind to say so,but you________it at all.