[填空题]
Vanadium and titaniums cjjtw.8,+pb are both common metals in781av;ob koe a aerospace engineering because they have a high strength to weight ratov7;k18eao abio.
1.vanadium has a melting point than titanium.
2.Titanium and vanadium are both able to conduct electricity. Explain how this is possible.
3.Tin is not a good choice for use in aerospace engineering. Predict, with a reason, why this is so.