2018-2019学年度高中英语(人教版)选修六学案课时作业
1)Costa Rica，a typical case of the several countries with great hydroelectric capacity，has completely made its electricity from renewable sources for 285 days in one year. (要点2)Denmark，instead，is out-standing in wind power. If wind is strong enough，the whole country cannot use up the electricity its turbines generate. (要点3)Uruguay is another example that supplies its electricity mainly with renewable sources. (要点4)