The optimal distance of the ultraviolet lights used to sterilize the items is
举一反三
- The should not be used when flying through clouds or overcast. A: navigation lights and flashing beacon B: strobe lights and flashing beacon C: strobe lights and courtesy lights
- 中国大学MOOC: What is the economic batch quantity used to establish?Optimal
- Many of the items will be used for ___________ and research, but the rhino horn will be destroyed.
- The Internet is often used as a_____and as a tool for distance learning.(资源)
- 中国大学MOOC: Do you ____________ used items, such as clothing?