New medicines and instruments every day to extend life.A. developB. are being developedC.

发布时间：2020-08-16 11:59:31


New medicines and instruments      every day to extend life.
A. develop
B. are being developed
C. are developing
D. have developed

网友回答

A. develop
(答案→)B. are being developed
C. are developing
D. have developed
解析：可联系答.案.网客服索取。
以上问题属网友观点，不代表本站立场，仅供参考！