题干
It is reported that many a new house________at present in the disaster area.
A：are being built
B：were being built
C：was being built
D：is being built
答案(点此获取答案解析）
D
2HI(g)达到平衡，图甲表示当起始物为1 mol·L－1 H2和1 mol·L－1 I2时，容器内各物质的浓度c的变化与时间t的关系示意图。 