【简答题】变压器铁心导磁性能越好,其励磁电抗越(),励磁电流越()
【简答题】变压器铁心导磁性能越好,其励磁电抗越越大,励磁电流越()。
【判断题】变压器铁心导磁性能越好,其励磁电抗越大 ,励磁电流越小 。
【简答题】世纪80年代后期,中国科学院开展了我国土地资源生产能力及环境人口容量研究工作。若以年人均消费粮食500千克、550千克和600千克三个方案测算,我国耕地资源可承载人口极限分别为l6.6亿、l5.1亿、l3.8亿。如按美国的消费水平,我国人口大致应控制在7亿之内。根据上述材料,回答题。 小题1:下列说法正确的是( )。 A.我国的合理人口容量在16亿左右 B.我国目前人口已大大超过环境人口容量...
【单选题】关于泪液的化学性质的说法,哪项不正确
C.
泪液中K+、Na+、Cl-浓度低于血浆中的浓度
【单选题】Why does Schultz pay so much attention to the benefits of his employees?
A.
He believes that good benefits can build his company a devoted workforce.
B.
He wants to make his company different from the fast food companies.
C.
His poor childhood made him feel very sympathetic toward the employees.
D.
His company is very successful and can easily afford good benefits.
【判断题】历史文本几乎不可能有完全客观的叙述。()