语法与词汇 27.It has long been known that total sleep______is 100 percent fatal to rats, yet, upon examination of the dead bodies, the animals look completely normal.
【正确答案】 C
【答案解析】本题中，C项“deprivation剥夺”符合题意。其他三项“deposition免职；destruction破坏，毁灭；reduction减少”都不正确。