二萜的基本碳架含有的碳原子数目是（） ["A.10","B.15","C.20","D.25","E.30"]
国际贸易额
口咽部癌症患者化疗期间，适宜选择下列哪类食品（）。 ["低脂肪、低蛋白食品","低能量食品","高蛋白、高铁、高维生素及升高白细胞的食品","清流质食品","硬质食品"]
青蒿素属于（） ["A.单萜","B.倍半萜","C.二萜","D.二倍半萜","E.三萜"]
U410/U310支持多少秒瞬间唤醒？（） ["A.5s","B.2s","C.1s","D.7s"]
出口替代
