80＋50=____
30＋90=____
-- How are you feeling here?
-- It's quite hot. I don't know to go or stay.
“古代的丝绸之路自古就是贸易和文化交流之路，和平之路……”***主席曾指出：丝绸之路是各国人民的共同财富，中国发扬丝绸之路精神，提出了“一带一路”的倡议……（一带即丝绸之路经济带），据图回答：
