问题
选择题
She went ____ a visit ____ her son in hospital. [ ]
A. on, at
B. on, to
C. to, at
D. out, at
答案
答案：B
搜题请搜索小程序“爱下问搜题”
She went ____ a visit ____ her son in hospital. [ ]
A. on, at
B. on, to
C. to, at
D. out, at
答案：B
；△H＝—92.4kJ·mol—1。在相同温度、相同体积的密闭容器中进行如下实验：①通入1molN2和3molH2达平衡时放出热量为Q1；②通入2molN2和6molH2，达平衡时放出热量为Q2，则下列关系正确的是( )