某个电厂有10台蒸汽参数为3.43MPa,435℃的汽轮发电机组,该电厂属于()。
A.高温高压电厂;
B.中温中压电厂;
C.超高压电厂;
D.低温低压电厂。
参考答案:B
My English teacher insisted that the exercises ____very difficult and that we ____them carefully.
A.were; must finish
B.be; finish
C.were; finish
D.be; finished
2岁患儿,胸骨左缘第3—4肋间可闻及Ⅳ级粗糙全收缩期杂音并广泛传导,可触及收缩期震颤,肺动脉瓣区第2心音亢进,X线显示主动脉结缩小。最可能的先天性心脏病是
A.房间隔缺损
B.大型室间隔缺损
C.小型室间隔缺损(Roger病)
D.动脉导管未闭
E.法洛四联症