综合填空
用所给词的适当形式填空。每词限用一次。
not plan, solve, enjoy, write, fill, discover
1.Laura usually ____ beautiful music to get relaxed.
2.Be careful! She ____ the cup with hot water.
3.In the future, humans ____ more secrets of nature.
4.To our surprise, the problem ____ by the expert three days ago.
5. ____ to your parents is a good way to communicate with them.
6.—Where are you going on vacation this summer?
— I ____ it yet.
，则原子核剩余部分的速率等于（ ）