Risk assessment of over-the-counter cannabinoid-based cosmetics: Legal and regulatory issues governing the safety of cannabinoid-based cosmetics in the UAE

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(旧译作鈤、銧)是一种化学元素,渠个化学符号是Ra,渠个原子序数是88,是一种银白色个碱土金属,带有放射性,而且十分贵重,每克约100美金。