什么是计量器具的检定？
参考答案：
查明和确认计量器具是否符合法定要求的程序，它包括检查、加标记和（或）出具检定证书。
根据句意填空，每空一词。
1. I'm t______. Can I get something to drink?
2. She often feels t______. She has to sit down and rest every five minutes.
3. The teacher doesn't know why the boy has so many ______ He always needs some help.
4. I can't work out the hard math ______.
5. —Can you help me buy a newspaper? —No ______.
6. ______ an apple a day is good for your health.
7. I feel t______ after a whole day's work.
8. We should get up e______ in order to catch an e______ bus.
9. Don't be s______ out. It's easy.
10. The Spring Festival is a______ Chinese festival.
11. Don't you ______ it? It's true.
A．打电话 B．等人 C．去开会
