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3.According to researchers,medical robots ________.
A.have been put into use widely
B.should be more individual
C.still can' t interact with humans
D.should have some character of art
答案 B [细节理解题。根据倒数第四段内容可知,研究者认为机器人应该被改进得更适合个体病人。]
[参考答案]1-4、BADA