第二部分：单句改错（满分10分）

91．People love to get together to eat and have a fun with each other．   91．__________

92．He was not going to hold his breathe for her to apologize．       92．__________

93．He could not have Yong Hui getting away to telling people lies．   93．__________

94．It would be better if you were a bit thin．                            94．__________

95．They see a penniless young man wandered on the pavement．      95．__________

96．I saw a man dressed in rag the other day．                      96．__________

97．They gave performances in pubs, for that they were paid in cash．    97．__________

98．Imagine our excitement when we heard it on the radio the first time．      98．__________

99．The carpet raised and at once they were in a thick rainforest．       99．__________

100．The coffee is excellent quality and has been sold very well．      100．__________

（11分）在一定温度下将2 mol A和2 mol B两种气体混合于某2L密闭容器中，发生如下反应：3A(g)+B(g) 2C(g)+2D(g)，2 min末反应达到平衡状态，生成了0.8 mol D，请填写下列空白：

（1）2min内B的反应速率为_________________

（2）此温度下该反应的平衡常数K=_________________________

（3）如果缩小反应容器的体积，使压强增大，平衡体系中C的物质的量浓度_____________，C的质量分数___________，容器内气体的平均密度________________，平均相对分子质量________________。（填“增大”、“减小”或“不变”）

（4）如果上述反应在相同条件下从逆反应开始进行，开始加C和D各4/3 mol，要使平衡时各物质的物质的量与原平衡相等，则还应加入__________物质___________mol。