什么是钻井液循环周?
参考答案:钻井液从井口泵入至井底再从井口返出所用的时间。
根据句意和首字母提示,写出单词。
l. It's the best w ____to get to school.
2. We can't see the s ____in the daytime, but we can see them at night.
3. Tony lives farthest from the school, so he has the longest j .
4. I don't (知道)the name of the tall boy.
5. Can you tell me the (道路)to Happy Park?
6. My____(最好的)friend likes bananas.
7. Shenzhen is a (现代的)city.I like it very much.
8. I live c to the school.
9. My father works eight h a day.
10. Chinese Airlines is one of the b ____international airlines.
旅游资源主要包括()
A.自然旅游资源
B.人文旅游资源
C.社会旅游资源
D.经济旅游资源