某筛子的小时给矿量为80t/h，筛下量为10t/h，求该筛子的产率。

细筛操作时，筛子的给矿量一定要保持均匀稳定，不要超负荷给矿或过少给矿。 细筛操作时，筛子的给矿量一定要保持均匀稳定，不要超负荷给矿或过少给矿。 If there is a rainstorm on August 10th,program B will start on（）    The position of the 10th thoracic segment of spinal cord is at the level of（） Why didn"t Reagan take a bus to go to 10th and Sherman?__________ _____the morning of September 10th, we are going to give our teacher some flowers.[ ] 某台筛子每小时处理300吨烧结矿，其中含返矿150吨，实际筛下100吨，筛分效率是（）。 Using the standard normal curve, the z-score representing the 10th percentile is 1.28. Our school has the parents’ meeting _____ the afternoon of October 10th, and it starts _______3p.m. Our school will have the parents’ meeting _____ the afternoon of November 10th, and it will start _______3p.m. US President Barack Obama ________ a national speech at the 10th anniversary of 9/11 terror attacks.[ ] I’ m pleased to receive your letter of April 10th, __________for our catalogue and price-list. I’m pleased to receive your letter of April 10th, ________ for our catalogue and price-list. Andy lives on the 10th floor. While his Uncle Jim lives 5 floors __________ in the same building. According to St. Bede, an English historian of the early 10th century, Easter was derived from the name Eostre. Ninety-six people lost theirlives in a plane crash on April 10th, 2010, _________the Polishpresident and his wife. The conference was _______ fixed for the 10th, August, but later the unexpected landslide(泥石流) in Zhouqu in Gansu province, made us put it off 给矿量偏高时，促成筛上产量亦高，（）低。 I’m pleased to receive your letter of April 10th，______ for our catalogue and price- list. (201812-B真题) 随着给矿量的增加，细筛筛上产率也增加，筛分效率逐渐（）。