The18thand19thcenturies________

发布时间：2020-07-28 12:31:53

The 18th and 19th centuries ________ the widespread use of electricity and the birth of the steam engine．A.madeB.provedC.sparedD.witnessed

网友回答

D
以上问题属网友观点，不代表本站立场，仅供参考！