What can we add to brass to improve machining:
A: Tin
B: Copper
C: Lead
D: Manganese
E: Carbon nanotubes
A: Tin
B: Copper
C: Lead
D: Manganese
E: Carbon nanotubes
举一反三
- Carbon 14 can only determine what kind of elements of cultural relics to determine the age.( ) A: copper B: nitrogen C: oxygen D: carbon
- Deepdrawingismosteffectivewithductilemetals,suchas. A: aluminum B: brass C: copper D: mildsteel
- Grey spot of oat are due to A: Copper B: Iron C: Manganese D: Zinc
- Among the cast of nanoparticle characters in targeted cancer killing are dendrimers, carbon nanotubes, and liposomes.
- The problem is _____ we can improve our reading skill in such a short time. A: A. when B: B. what C: C. how D: D. that