— Did you have a good time last night?
— Yes, I did. It was a long time since I _____ myself.
A:haven't enjoyed
B:didn't enjoy
C:enjoy
D:had enjoyed
A、向一定量稀盐酸中加水稀释
B、两份完全相同的过氧化氢溶液分别制取氧气
C、向两份完全相同
的稀盐酸中分别加入锌粉、镁粉
D、向盐酸和氯化镁的混合溶液中加氢氧化钾溶液
如图是太阳系局部图,黑点表示小行星.回答下列下题.