．FDA can ask for the proof of safety and effectiveness of a product ________.
A. if it is a drug
B. if it is a device
C. if its consumers make complaints
D. if its distributors challenge FDA’s authority
正确答案：A
．FDAcanaskfortheproofofsafetyandeffectivenessofa
本文来自网络，不代表煤炭资讯立场。转载请注明出处： http://www.mtxh.cn/mhg/js-mhg/423384.html
