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Science Bowl Question

📅 NSB 2011 Set 4🎓 HS🔄 Round 8#️⃣ Question 19🌟 Bonus📝 Multiple Choice

Plug-in hybrid electric vehicles are:

W) Completely powered by electricity
X) Powered by electricity until batteries are discharged and then powered by gasoline
Y) Completely powered by solar energy
Z) Powered completely by biofuels
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