某基坑底面尺寸为3m×4m,土方的开挖深度为1.8m,土方边坡坡度为1:0.33则四边放坡后基坑的上口面积为()m2 A: 12 B: 16.31 C: 27.84 D: 21.73
某基坑底面尺寸为3m×4m,土方的开挖深度为1.8m,土方边坡坡度为1:0.33则四边放坡后基坑的上口面积为()m2 A: 12 B: 16.31 C: 27.84 D: 21.73
Directions: After reading the following passage, you will find 5 questions or unfinished statements. For each question or statement there are 4 choices marked A）, B）, C) and D）.You should decide which is the correct answer. Authorities want to ensure at least 96 percent of food sold at markets and restaurants meets the nation's health requirements this year. A monitoring network of meat products will be in full operation this year, as the authorities will investigate all feed lots, butcheries, the transportation sector and wet markets to ensure meat safety. Every district will set up one or two streets as food safety models to improve the quality of local restaurants. Meanwhile, "Management on medicine and medical equipment will be more strict this year (2008)," said the director of Food and Drug Administration. "All medical implants must be included in a database for monitoring". Supervision of production and sales of medication containing drugs will also be key tasks this year, as the city has been chosen as host for the Olympic Games in August. About 91.16 percent of the food undergoing spot checks last year qualified, 2.16 percent higher than the previous year. More than 95 percent of staple (主食) foods such as rice and oil met quality standards in last year's check. There were 13 mass food poisoning cases in 2007, affecting 326 people. Both the number of case and victims dropped 60 percent compared with 2006. Authorities confiscated (没收) illegal products worth 3.42 million yuan (US$481,000) and issued fines totaling 21.73 million yuan for cases involving in illegal medicine and medical equipment.
Directions: After reading the following passage, you will find 5 questions or unfinished statements. For each question or statement there are 4 choices marked A）, B）, C) and D）.You should decide which is the correct answer. Authorities want to ensure at least 96 percent of food sold at markets and restaurants meets the nation's health requirements this year. A monitoring network of meat products will be in full operation this year, as the authorities will investigate all feed lots, butcheries, the transportation sector and wet markets to ensure meat safety. Every district will set up one or two streets as food safety models to improve the quality of local restaurants. Meanwhile, "Management on medicine and medical equipment will be more strict this year (2008)," said the director of Food and Drug Administration. "All medical implants must be included in a database for monitoring". Supervision of production and sales of medication containing drugs will also be key tasks this year, as the city has been chosen as host for the Olympic Games in August. About 91.16 percent of the food undergoing spot checks last year qualified, 2.16 percent higher than the previous year. More than 95 percent of staple (主食) foods such as rice and oil met quality standards in last year's check. There were 13 mass food poisoning cases in 2007, affecting 326 people. Both the number of case and victims dropped 60 percent compared with 2006. Authorities confiscated (没收) illegal products worth 3.42 million yuan (US$481,000) and issued fines totaling 21.73 million yuan for cases involving in illegal medicine and medical equipment.