【多选题】生化分离技术是指从含有目标产物的( )中,提取、精制并加工制成高纯度的、符合规定要求的各种产品的生产技术
【判断题】物质文化是人类加工自然创制的各种器物,是人的物质生产活动方式和产品的总和,它包括制度文化和行为文化两个层面。
【简答题】设A是n级方阵,|A|=5, 则 的特征值是( ), 特征向量是( )。
【单选题】血液凝固的主要步骤是
C.
凝血酶原激活物形成→凝血酶形成→纤维蛋白形成
E.
凝血酶原激活物形成→凝血酶原形成→纤维蛋白原形成
【单选题】Some immigrant advocates worry that as hard financial times make it more difficult for natives to keep jobs, such measures will become more a vehicle for intolerance than integration. The underlined s...
A.
reduce Italy's population quickly
B.
cause conflicts among people
C.
lead to financial difficulties
D.
put pressure on schools
【判断题】实地盘存制是平时根据会计凭证在账簿中登记各种财产物资的增加数和减少数,在期末再通过盘点实物,来确定各种财产是数量,并据以确定账实是否相符的一种盘存制度。
【单选题】Motor vehicle deaths in the U.S. declined from nearly 60,000 in 1966 to just over 40,000 in 2011, even though Americans drive millions more miles now and millions more vehicles are on the road. The de...