某种温度时,下列前三个反应的标准平衡常数分别为 K 1 Θ 、 K 2 Θ 和 K 3 Θ ,则第四个反应的 K Θ 等于 ( ) (1) CoO(s)+ CO(g) ⇌ Co(s) + CO 2 (g) (2) CO 2 (g) + H 2 (g) ⇌ CO(g) + H 2 O(1) (3) H 2 O(1) ⇌ H 2 O(g) (4) CoO(s) + H 2 (g) ⇌ Co(s) + H 2 O(g) K 1 Θ K 2 Θ / K 3 Θ
【单选题】听力原文:W: You don't feel very well, do you? You look pale. Have you got a cold? M: Oh, no, but my stomach aches. Maybe the sea food doesn't agree with me. What probably caused the man's stomachache?