题干
My father is very busy and doesn't come back home until midnight.
A：the middle of night
B：the end of night
C：the beginning of night
答案(点此获取答案解析）
A
My father is very busy and doesn't come back home until midnight.
A：the middle of night
B：the end of night
C：the beginning of night
H2（g）＋Br2（g）－Q，若升高温度，发生改变的是 （ ）