There is no treatment so far for severe acute respiratory syndrome (SARS), which has symptoms similar to ______.
A. pneumonia
B. rendezvous
C. palsy
D. pregnancy
查看答案
She works in the ______ department of a big store.
A. literature
B. stationery
C. institution
D. transplantation
His father had been ______ the idea ______ for some time.
A. turning / over
B. bringing / in
C. looking / over
D. kicking / out
构成大气污染的主要来源是( )
A. 居民炉灶的废气
B. 工业废气
C. 交通运输废气
D. 森林火灾
E. 农药弥散
SO2是大气中主要污染物,生活中其主要来源( )
A. 石油
B. 煤
C. 汽油
D. 天然气
E. 菜油