焊工应经过考试取得合格证，停焊时间达（）及以上，必须重新考核方可上岗操作。（）。
A.3个月
B.6个月
C.9个月
D.12个月
参考答案：B
小题1:86 great achievements the future may have 87 for China, it is likely that many of them will be born in northwestern Beijing.
小题2:By 88_____ the scientific developments of his day one step 89_____, Jules Verne 90_____ the foundation of modern science fiction.
小题3:Water can absorb and give off a lot of heat without big changes in temperature, thus 91__________ a stable environment.
小题4:The town 92______ many shops, cafés and a wide 93______ of entertainment.
小题5:Slowly but surely, Atlanta was becoming a successful city 94____________ of its culture 95_________.
《全国主体功能区规划》提出，水资源开发利用的地区不包括( )。
A．松花江、辽河区 B．长江、西南诸河区C．长江、东南诸河区 D．黄河、淮河、海河区
