可以让我们观看许多娱乐节目。（ ）
A：电话
B：报纸
C：电视
—The plane is leaving right now, but Jim hasn't arrived yet.—Well, he said he _____here on time.
There are animals in the zoo.
H﹣H 436.4 Cl﹣Cl 242.7 H﹣Cl 431.8
①写出氢气在氯气中燃烧生成氯化氢气体的热化学方程式：____．
②若有1g氢气在氯气中完全燃烧，可放出热量____ kJ．
