问题
选择题
The reason ________they were fired was ____they were not honest.
A．for ;because
B．why ; that
C．for ;that
D．why ;because
答案
答案：B
考查名词性从句。句中考查the reason why … was that …“……的原因是……”结构，why引导定语从句，that引导表语从句。故选B。
Fe3O4（s）+4H2（g），反应的化学平衡常数的表达式为[ ]
