在热力管道坡度的最低点,应设置排水装置;在其最高点应设置放气阀。
参考答案:对
---Are you going to Tom’s birthday party?
---_________.I might have to work.
A.Sound great
B.Thank you
C.It depends
D.Don’t mention it
出现上皮下疱()
A.类天疱疮
B.天疱疮
C.艾滋病
D.多形红斑
E.唇疱疹