题目内容
某现浇钢筋混凝土梁板结构中的次梁，截面尺寸为b×h=200mm ×500mm， bf'=800mm，hf'= 110；混凝土等级为C25，钢筋采用HRB335，环境类别为一类。计算简图如下。
若gk=20kN/m，qk=18kN/m。则跨中最大弯矩设计值M1=______ kN·m。
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按照上帝创世说，上帝在第一天创造了地球，第二天创造了月亮，第三天创造了太阳。因此，地球存在的头两天没有太阳。以下哪项指出了上述断定的逻辑漏洞？
根据我国的规划法,城市规划的编制和审批实行分级体制,其具体运作方式有()。
①县级人民政府所在地镇的城市规划由县级人民政府负责组织编制
②直辖市的城市总体规划由直辖市人民政府报国务院审批
③省和自治区人民政府所在地城市、城市人口在100万以上的城市以及国务院指定的其他城市的总体规划,由省、自治区人民政府审查同意后,报国务院审批
④其他城市的总体规划和县级人民政府所在地镇的总体规划,报省、自治区和直辖市人民政府审批
⑤市管辖的县级人民政府所在地镇的总体规划,报市人民政府审批
⑥分区规划和详细规划一般由市人民政府城市规划行政主管部门审批
听力原文： Authorities in Brazil say they have completed slaughtering hundreds of cows in one of the country's key cattle states in a move to prevent the spread of hoof-and-mouth disease.
Police supervised the slaughter of more than 200 head of cattle in Rio Grande do Sul state Thursday. The carcasses were buried in large open pits.
Brazilian officials have expressed optimism that they have stemmed the spread of the highly contagious virus, which was discovered in 11 Brazilian cattle earlier this month.
The European Union, Chile and several Arab state., have suspended imports of beef from Rio Grande do Sul, which is responsible for nearly 10 percent of Brazil's beef exports.
The government says it plans to compensate the ranchers for their lost livestock.
Why were hundreds of cattle slaughtered in Brazil？
The American professor came to realize that he had underestimated the ________ of most of
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