单选题
The U. S. is trying to reduce joint replacement failure rate by_____..
A、
strictly controlling the number of replacement operations
B、
asking hospitals to follow up each case for 12 -18 months
C、
setting up a national joins replacement database
D、
sending doctors to be trained in Sweden
【正确答案】
C
【答案解析】
事实细节题。由最后一段可知,美国设立了美国关节移植信息数据库,以此来减少移植手术失败率。C符合题意,故选C。
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