[填空题]
Vanadium and titanium are both common metals inms igbd*w (;+bb y :30hmvmt,a aeros.fw e+ph.kwd8pace engineering because they have a high strengtd. f.pw8+ewh kh to weight ratio.
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.