下列做法正确的是（ ）
A：为节约药品，把实验剩余的药品放回原试剂瓶
B：滴瓶上的滴管用过后都应立即用水冲洗
C：给试管里的药品加热，一定要先进行预热
D：没有说明药品用量时，取量越多越好，现象更明显
用下列词语造句
①月落
②客船
(____) It's a programme about China.
(____) We've got lots of food.
(____) Thank you for talking to us.
(____) She couldn't read or write.
(____) He didn't have any legs then.
