单项选择题：井下巷道粉尘厚度超过（）毫米连续长度超过（）米视为煤层堆积。A、3，5 B、2，5 C、

井下巷道粉尘厚度超过（）毫米连续长度超过（）米视为煤层堆积。

A、3，5

B、2，5

C、2，6

D、3，6

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参考答案：B解析：关汉卿是一位熟悉勾栏伎艺的戏曲家，《析津志》说他“生而倜傥，博学能文，滑稽多智，蕴藉风流，为一时之冠”。明代臧懋循《元曲选·序》说他“躬践排场，面敷粉墨。以为我家生活，偶倡优而不辞...

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There ___1___a park near my home. People like to go there __2__work. Some of them go to the park every day. Look ! That's Mr King. He ___3___on a chair and __4__the children. Some boys ___5___football. Lucy and Lily arestanding under the tree. They are___6__. There is a small__7___ in the park. We can see some ___8___ on the lake. Some children are sitting in the boats__9____their fathers and like mothes. Listen! A girl____10___. This is really a nice park.
( )1. A. have ( )2. A. after ( )3. A. sits ( )4. A. looking ( )5. A. are buying ( )6. A. saying ( )7. A. zoo ( )8. A. buses ( )9. A. With ( )10. A. sings	B. is B. before B. sat B. seeing B. are playin B. speaking B. park B. boats B. and B. songs	C. has C. at C. are sitting C. watching C. is buying C. talking C. street C. planes C. on C. is singing	D. are D. in D. is sitting D. reading D. is playing D. telling D. lake D. bikes D. in D. are singing