2012年12月大学英语六级阅读专项练习题17& w& O% X, Q" N V' R- z6 t' ]4 ~3 N! P4 F6 M$ c
: X* d* a# }5 @+ }4 W
1．What is the topic of the passage? 5 w+ E1 r& ^3 }" L5 ~
2．Where was ice used after the Civil War? , y _& U! D) D# h( W 3．What was essential to a science of refrigeration according to the passage? 4 C1 j( o- G) f5 U) m 4．It can be inferred from the passage that the theoretical foundation of ice box should be that____________. 0 B7 L0 e: R2 O v3 e5 f7 Q' j* R 5．Without an ice box，farmers had to go to the market at night because_______.
发表于 2012-8-14 10:30:44
V' R- z6 t' ]4 ~3 N! P4 F6 M$ c
楼主
