题干
The children all turned__________the famous actress as she entered the classroom.
A：looked at
B：to look at
C：to looking at
D：look at
答案(点此获取答案解析）
B
SO3(g) ΔH＝－98.32 kJ/mol，在容器中充入2 mol SO2和1 mol O2充分反应，最终放出的热量为