题干
读句子，选出正确的答语。
A.Turn left at the crossing.
B.It's near the hospital.
C.It's under the tree.
D.No, there isn't
E.She is watching TV.
读句子，选出正确的答语。
A.Turn left at the crossing.
B.It's near the hospital.
C.It's under the tree.
D.No, there isn't
E.She is watching TV.
2HI(g)已达到平衡状态的是( )