Ai ơi giúp mình 3 câu này với. 1. Từ CH4 và các chất vô cơ cần thiết khác hãy điều chế cao su isopren 2. Sắp xếp các chất sau theo chiều acid, base tăng dần, giải thích a, 4-clophenol; 2,4-diclophenol; 2,4,6-triclophenol b, HCOOH, CH3COOH, (CH3)2CH-COOH, C6H5COOH 3. C6H6 (xúc tác H2SO4)=>A(xúc tác Br2)=>B(xúc tác H2O, nhiệt độ,p)=>C(xúc tác NaOH, 300 độ, 200atm)=>D

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.