when 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever ?
(1) 880 children developed neither inflammation nor fever
(2) 20 children developed fever.
我选的E,key C
想问some developed inflammation at the site of the inoculation and some developed fever的意思就是没有既 inflammation又fever的,是吗?