①131I 与132I ②C60与石墨 ③CH3Cl 与CH3CH2Cl ④硫酸氢钠 ⑤氯化镁 ⑥氩
⑦过氧化氢 ⑧ 与 ⑨CS2
⑩过氧化钠
—I think buyers________ spend too much time going to shops.