题干
—How long have you _________ your watch? It looks new.
—Only about three weeks.
A：had
B：bought
C：received
D：borrowed
答案(点此获取答案解析）
A
—How long have you _________ your watch? It looks new.
—Only about three weeks.
A：had
B：bought
C：received
D：borrowed
4NO(g)＋6H2O(g)，下列叙述正确的是：