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【简答题】
There were days in which Danny could forget that he had graduated from Boston University. After 17 years of education in the finest schools in America, he couldn't repair a burnt connection in his car or locate a carburetor ( 化油器 ). Danny is an educated man. He is a master of writing papers, taking tests, talking, and filling out forms. He can discuss Freud from a Marxian viewpoint and he can discuss Marx from a Freudian viewpoint. In short, Danny is a worker without skills, and he has a sociology degree to prove it. He is of very little use to American industry. This is nothing new. Colleges have been turning out workers of this sort for decades. Until five years ago, most of these workers took their degrees in sociology, philosophy, political science, or history, and marched right into the American middle class. Some found work in business and government but many, if not most, went into education, which is the only thing they knew anything about. Once there, they taught another generation the skills necessary to take tests and write papers. But the cycle broke down. There are too many teachers these days, college applications are down, plumbers are making $ 12 an hour, and graduates with degrees in fields like sociology are faced with a choice: graduate school or drive a taxi. Danny chose the taxi because driving was about the only skill he had that he could make money with. Danny refers to his job as "Real World 101". He has been beaten and shot at. But he has also acquired some practical skills: he can get his tickets fixed; he knows how to cheat the company out of a few extra dollars a week; he found his carburetor, and he can fix it.
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【简答题】是指 动物机体每kg体重接触毒物的量(mg/kgBW)。
【多选题】静电的电量虽然不大.但其放电时产生的静电火花有可能引起爆炸、火灾、及造成精密实验仪器损坏.正确的预防措施有( )。
A.
适当的提高工作场所的湿度
B.
进行特殊危险实验时.操作人员应先接触设置在安全区内的金属接地棒.以消除人体电荷
C.
尽量穿不宜产生静电的工作服.不要在易产生静电的场所梳理头发
D.
计算机进行维护时.先将手触摸其他金属导电体.然后再拆机
【判断题】摩擦角是指全约束反力与约束面法线间的夹角。
A.
正确
B.
错误
【简答题】用磺基水杨酸法测定微量铁。按下表所列数据取不同质量标准溶液,显色后稀释至相同体积,在相同条件下分别测定各吸光值数据如下: m Fe /mg 0.0000 0.1001 0.2002 0.3002 0.4003 0.5004 A 0.000 0.165 0.320 0.480 0.630 0.790 移取2.00mL,在与绘制工作曲线相同条件下显色后测其吸光度得A=0.500,求试液中铁含量(以mg...
【简答题】用磺基水杨酸法测定微量铁。称取 0.2160 g 的 NH 4 Fe ( SO 4 ) 2 • 12H 2 O 溶于水稀释 至 500 mL ,得铁标准溶液。按下表所列数据取不同体积标准溶液,显色后稀释至相同体积, 在相同条件下分别测定各吸光值数据如下: V /mL 0.00 2.00 4.00 6.00 8.00 10.00 A 2.00 0.165 0.320 0.480 0.630 0.79...
【简答题】用磺基水杨酸法测定微量铁。称取 0.2160g的NH 4 Fe(SO 4 ) 2 12H 2 O溶于水并稀释至500mL,得铁标准溶液浓度为( ) u g/ml ? 已知 M[ NH 4 Fe(SO 4 ) 2 12H 2 O ]=482.178g/mol
【判断题】1.摩擦角是全约束反力与接触面法线间的夹角,对吗?
A.
正确
B.
错误
【单选题】“十年树木、百年树人”反映了人力资源的哪项作用?( )
A.
价值性
B.
稀缺性
C.
难以模仿性
D.
可实现性
【单选题】.静电的电量虽然不大,但其放电时产生的静电火花会有可能引起爆炸和火灾,比较常见的是设备仪器的损坏,正确的预防措施有?
A.
适当的提高工作场所的湿度
B.
进行特殊危险实验时, 操作人员应先接触设置在安全区内的金属接地棒, 以消除人体电位
C.
尽量穿不宜产生静电的工作服,不要再易产生静电的场所梳理头发
D.
以上都正确
【判断题】生石灰与水起反应生成熟石灰,同时发出热,但并不发出光,这只是化学反应,并不属于燃烧。( )
A.
正确
B.
错误
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