题干
——Jack, you seem to be _______.
——Yes. It's 8: 20now and my train leaves in ten minutes.
A：in a hurry
B：in fear
C：in safety
D：in silence
答案(点此获取答案解析）
A
——Jack, you seem to be _______.
——Yes. It's 8: 20now and my train leaves in ten minutes.
A：in a hurry
B：in fear
C：in safety
D：in silence
CH3OH(g)过程能量情况如下图所示，曲线I和曲线Ⅱ分别表示不使用催化剂和使用催化剂的两种情况。下列判断正确的是 （ ）