A:容器①中反应达平衡时,CO的转化率为80%
B:平衡时,若向容器①中再加入0.2molCO和0.2molCO2,则V正<V逆
C:Q=8.2
D:容器①中CO的转化率与容器②中CO2的转化率之和为1
如图,观测点A、旗杆DE的底端D、某楼房CB的底端C三点在一条直线上,从点A处测得楼顶端B的仰角为22°,此时点E恰好在AB上,从点D处测得楼顶端B的仰角为38.5°.已知旗杆DE的高度为12米,试求楼房CB的高度.(参考数据:sin22°≈0.37,cos22°≈0.93,tan22°≈0.40,sin38.5°≈0.62,cos38.5°≈0.78,tan38.5°≈0.80)
根据短文内容判断下列说法的正误。
There are four seasons in a year.They are spring,summer,autumn and winter.Spring is green with flowers.I can plant trees in spring.Summer is hot.I can swim in the sea.In autumn,farmers are busy.I can eat moon cakes and pick apples in autumn.But I like winter best.Winter is cold.Sometimes it snows.I often skate in winter.Sometimes l make a snowman.
蚌埠市某天的天气情况如图( )