题干
You could see the runners very well from ______ we stood.
A：which
B：where
C：that
D：whe
答案(点此获取答案解析）
B
A：which
B：where
C：that
D：whe
4C(g)＋D(g)；△H＜0。在一定温度、压强下达到平衡。平衡时C的物质的量与加入的B的物质的量的变化关系如下图。下列说法正确的是
