1. Add 5 drops of ethyl acetate in vitro medium sniffing and recording
two. The solution H_ (2) SO 〖〗 _4 2 mol / dm 〖〗 ^ 3 5 drops into test tubes in Article 1. Turn off the spigot loosely and then heated in hot water for about 5 minutes and set aside to cool smell. results
การแปล กรุณารอสักครู่..