题干
—Didn’t the guard see him breaking into the bank？
—No, he _______ in the other direction.
A：was looking
B：had looked
C：looked
D：is looking
答案(点此获取答案解析）
A
A：was looking
B：had looked
C：looked
D：is looking
C（g）＋D（g）,5 min后达到平衡．已知该温度下其平衡常数K＝1，若温度不变时将容器的体积扩大为原来的10倍，A的转化率不发生变化，则 （ ）
