用中砂做砂垫层时，其干密度为（）。 A.≥1.5t/m3 B.≥1.6t/m3 C.
题型：单项选择题
问题：
用中砂做砂垫层时，其干密度为（）。
A.≥1.5t/m3
B.≥1.6t/m3
C.≥1.7t/m3
D.≥1.8t/m3
题型：单项选择题
| 完形填空 | ||||
| It was a cool October evening.Excitement and family members__1__the hall.I was only a 7yearold girl, but I was the center of__2__.Finally, after weeks of preparation, I would__3__all my hard work in a dance performance.Everything would be__4__-so I thought.I waited backstage all__5__in my black tights with a golden belt.In a loud and clear voice, the master of ceremonies__6__that my class was next. My dance class was doing a routine on wooden boxes two feet by two feet, facing the__7__.All I had to do in the next move was put one foot on the box next to mine and keep my other foot on my box.It really was an__8__m  ove.I was concentrating so much on__9__the huge smile on my face and holding my head up that I did not look__10__I was going.I missed my partner's box altogether and__11__. There I was standing on the stage floor when my classmates were on top of their boxes.I could hear giggles(咯咯笑)coming from the audience, and I felt the__12__rush to my face.I remembered my dance teacher had told us, "  If you make a mistake, keep smiling so the audience will not__13__."I did my bestto follow her__14__as I continued with the routine. When th  e curtain dropped, so did my__15__for the evening.I__16__bitterly, tasting the salt from thetears that streamed down my face.I ran backstage, but no one could__17__me down. Recently I realized I had been a__18__that night.I was__19__, but I fought the urge to run off the stage.__20__, I finished the routine with a smile on my face.Now when friends and family laugh about the time I slipped during a dance performance, I can laugh to  o. | ||||
|