Sporting activities are essentially
modified forms of hunting behavior. Viewed biologically, the modem foot-bailer
is in reality a member of a hunting group. His killing weapon has turned into a
harmless football and his prey (猎物) into a goalmouth. If his aim is accurate and
he scores a goal, he enjoys the hunter’s triumph of killing his prey. To understand how this transformation has taken place we must briefly look back at our forefathers. They spent over a million years evolving as cooperative hunters. Their very survival depended on success in the hunting-field. Under this pressure their whole way of life, even their bodies, became greatly changed. They became chasers, runners, jumpers, aimers, throwers and prey-killers. They cooperated as skillful male-group attackers. Then about A. are forms of biological development B. have actually developed from hunting C. are essential forms of taming the prey D. have changed the ways of hunting [填空题]S31S38
[多项选择]下列属于塔机月检内容的有()
A. 钢丝绳 B. 基础与附着装置 C. 避雷、接地电阻 D. 核实保养记录 E. 力矩与起重量限制器等各种安全装置是否可靠有效 [单选题]在 MySQL 中,筛选员工表中年龄在30-50岁之间的员工,说法错误的SQL语句是()。
A.SELECT * FROM 员工表 WHERE 员工姓名 BETWEEN 30 AND 50 B.SELECT * FROM 员工表 WHERE 员工姓名>=30 AND 员工姓名<=50 C.SELECT * FROM 员工表 WHERE 员工姓名 BETWEEN 30 AND 50 和 SELECT * FROM 员工表 WHERE 员工姓名>=30 AND 员工姓名<=50 D.以上说法都不正确 [单选题]隧道区间正线设紧急疏散平台,疏散平台边缘距设备限界不大于()mm,以防止人踩空掉入轨道。
A.50 B.70 C.80 D.90 [判断题]移动式搅拌机就位后,应放下支腿将机架顶起达到水平位置,并使轮胎稳定支撑在地 面上
A.正确 B.错误 [单选题]润滑轴承的润滑脂数量以占轴承空间为宜
A.2/3~1/2 B.1/4~1/2 C.1/3~1/2 D.3/4~1/2 [填空题]载波功率是指在无调制情况下,发信机在()周期内供给天线馈线的平均功率。
[多选题]满足一定条件的燃油、燃气锅炉房,油浸电力变压器室设置在民用建筑内时尚应符合下列条件:( )。
A.锅炉房、变压器室的门均应直通室外或直通安全出口 B.外墙开口部位的上方应设置宽度不小于0.8m的不燃烧体防火挑檐或高度不小于1.2m的窗槛墙 C.锅炉房、变压器室与其它部位之间应采用耐火极限不低于2.00h的不燃烧体隔墙和1.50h的不燃烧体楼板隔开 D.在隔墙和楼板上不应开设洞口,当必须在隔墙上开门窗时,应设置耐火极限不低于0.9h的防火门窗 E.锅炉房的储油间,其总储量不应大于1m3 [多选题]现金整点要求做到( )。
A.点准 B.挑净 C.墩齐 D.捆紧 E.盖章清楚 [填空题]广谱的β-内酰胺类抗生素有()、()、()、()。
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