【单选题】下列反应中,熵减小(即ΔrSm < 0 )的是:
A.
2CO(g) + O2(g) = 2CO2(g)
B.
2NH4NO3(s) = 2N2(g) + 4H2O(g) + O2(g)
【简答题】Listen and choose.(听老师读,选出正确的词语的序号填空。) ( )1. A. date ( )1. A. fall ( )1. A. swim ( )1. A. sleep ( )1. A. noon B. her B. which B. ninth B. winter B. usually C. always C. often C. be...
【判断题】数列4、5、6、7、8与数列8、7、6、5、4是同一个数列
【单选题】下列说法中正确的是 [ ]
B.
自发反应一定是熵增大,非自发反应一定是熵减小或不变
C.
凡是放热反应都是自发的,吸热反应都是非自发的
【单选题】下列说法中,正确的是( )
A.
自发反应一定是熵增大,非自发反应一定是熵减小或不变
【单选题】What do many small business owners choose as the name for their business?
A.
They choose a name which explains what they do.
B.
They choose an important name.
C.
They try to get a clever name.
D.
They try to get an interesting name.
【简答题】Listen and choose. ( )1. A B ( )2. A B ( )3. A B ( )4. A B ( )5. A B
【简答题】Listen and choose. 真假美猴王。(听录音,选答语) ( )1. ( )2. ( )3. ( )4.