【单选题】正常人血清中每100 ml约含Ca 2+ 10 mg,其物质的量浓度是多少 ( )
【单选题】正常人血清中每 100 ml 约含 Ca 2+ 10 mg ,其物质的量浓度是多少 ( )
【单选题】和砌体结构、钢结构相比,下列属于混凝土结构缺点的是()。
【判断题】Chief executives should be credible.
【单选题】What is true about European chief executives?
A.
They are dynamic and harsh in management.
B.
They will be hard on others once they get to the top.
C.
They have less job security than their American counterparts.
D.
They work longer than their American counterparts.
【单选题】沈括在书里说“此物后必大行于世”,是什么意思?
【单选题】Compared to America,
A.
there is more competition for chief executives in Europe.
B.
lifers in Europe have more chances to get to the top.
C.
it takes lifers in Europe less time to get to the top.
D.
executives in Europe hop less frequently from job to job.