题干
—_______ do you feel about noise?
—It makes me annoyed.
A：What
B：When
C：How
D：Why
答案(点此获取答案解析）
C
—_______ do you feel about noise?
—It makes me annoyed.
A：What
B：When
C：How
D：Why
2Z(g)，已知X2、Y2、Z的起始浓度分别为0.1mol/L、0.3mol/L、0.2mol/L，在一定条件下，当反应达到平衡时，各物质的浓度有可能是