The common feature of the three complement activation pathways is
A. The same C5 convertase is required.
B. The same ions are required.
C. The same C3 convertase is required.
D. The same activators are required.
E. The formation of membrane attack complex and its cytolytic effect are the same
查看答案
In MBL pathway, which of the following is not related to the formation of C5 convertase?
A. C4
B. MASP
C2
D. C3
E. Factor B
某企业经批准评价发行优先股股票,筹资费率和股息年利率分别为5%和8%,则优先股成本为()。
A. 8.42%
B. 3.26%
C. 5.58%
D. 11.72%
关于资本结构理论表述正确的是()。
A. 等级筹资理论认为企业偏好内部筹资,如果需要外部筹资偏好股票筹资
B. 净收益理论认为负债率的大小对企业价值没有影响
C. MM理论认为任何情况负债越多,企业价值越大
D. 净营业收益理论认为企业不存在最佳资本结构
只要企业存在固定成本,当企业息税前利润大于零时,那么经营杠杆系数必()。
A. 恒大于1
B. 与销售量成正比
C. 与固定成本成反比
D. 与风险成反比