A. be long splices only B. have extra tucks taken C. be short splices only D. be around a thimble
A. 爆炸法 B. 焚烧法 C. 溶解法
A. 磷酸盐 B. 碳酸盐 C. 尿酸盐 D. 草酸盐 E. 无定形磷酸盐