____ A.cow B. horse C. sheep D. animal
____ A. pig B. litter C. throw D. open
____ A. zoo B. farm C. great D. school
____ A. moo B. tiger C. quack D. neigh
____ A. duck B. cows C. horses D. pigs
下图是新航路开辟航线示意图,其中开辟A航线的航海家是
居民与自然环境关系密切,下列四种民居中,能反映湿热特点的是( )