问题
选择题
-We didn’t see Smith at the meeting
-He______about the lecture
A．didn't tell
B．had not told
C．told
D．had not been told
答案
答案：D
搜题请搜索小程序“爱下问搜题”
-We didn’t see Smith at the meeting
-He______about the lecture
A．didn't tell
B．had not told
C．told
D．had not been told
答案：D
2Z(g) 经过10 min反应达到平衡状态，Y的浓度为0.2 mol/L，Z的物质的量分数为。计算并回答：
aX(g)+3Y(g)的平衡常数为___________