题干
–________ he made up his mind to take a trip to Europe?
–Last week when he got an unexpected reward.
–Last week when he got an unexpected reward.
A：When was it that
B：That was it whe
C：That it was whe
D：When it was that
答案(点此获取答案解析）
A
的最小值是（ ）
H2(g)＋Br2(g) ΔH＞0，达到平衡时，要使混合气体颜色加深，可采取的方法是（ ）
