问题
选择题
John had to have his car repaired in a garage because it ______ seriously. [ ]
A. damaged
B. had been damaged
C. had damaged
D. was being damaged
答案
答案：B
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John had to have his car repaired in a garage because it ______ seriously. [ ]
A. damaged
B. had been damaged
C. had damaged
D. was being damaged
答案：B
一定温度下，在4个容积均为1 L的恒容容器中分别进行反应(各容器中A都足量）A(s)+B(g）
C(g)+D(g） ΔH ="+100" kJ·mol-1，某时刻测得部分数据如下表：
| 容器编号 | n(B)/mol | n(C)/mol | n(D)/mol | 反应时间/min | 反应速率 |
| Ⅰ | 0．06 | 0．60 | 0．10 | t1 | v(正)=v(逆) |
| Ⅱ | 0．12 | 1．20 | 0．20 | t2 | |
| Ⅲ | 0．32 | 1．0 | 0 | 0 | |
| Ⅳ | 0．12 | 0．30 | v(正)=v(逆) |
下列说法正确的是
A．容器Ⅰ中平均反应速率v(B)=0．04/t1 mol·L-1·min-1
B．t2时容器Ⅱ中v(正)＞v(逆)
C．容器Ⅲ中反应至平衡时吸热20 kJ
D．容器Ⅳ中c(D)= 0．4 mol·L-1