【单选题】Words may fall into ___________.
A.
the basic word stock and non-basic vocabulary by frequency of use
B.
content words and functional words by notion
C.
native words and borrowed words by origin
【判断题】English words may fall into the basic word stock and nonbasic vocabulary by usefrequency.
【单选题】____ has been reported _____ sales of beef in China will increase.
【多选题】资本主义的基本矛盾是( )
C.
生产资料资本主义私人占有和生产社会化之间的矛盾
D.
生产力和生产关系之间的矛盾在资本主义社会的具体体现
【判断题】The sales for beef have been flat in recent years.
【简答题】We should simultaneously sign two contracts, one sales contract for beef and mutton, and the other contract of equal value for the purchase of cotton.
【多选题】根据喷头的常开、常闭形式,自动喷水灭火系统可分为闭式系统和开式系统,其中闭式系统有( )。