为了防止胶体附着于反应器内壁，反应器内衬有一层（）。

A、聚乙烯板

B、聚丙烯板

C、聚氯乙烯板

D、苯乙烯

Economics commentator Gail Brythe is discussing the different factors that influence the elasticity of supply. She states the following: Statement 1: Elasticity of supply is greater when a good or service can only be produced with unique or rare inputs. Statement 2: Typically, a good’s momentary supply elasticity is higher than its short-run supply elasticity, which in tuna is higher than its long-run supply elasticity. Are Brythe’s statements correctStatement 1 Statement 2（） ①A. CorrectCorrect ②B. CorrectIncorrect ③C. Incorrect Incorrect

A. ①

B. ②

C. ③