某公司的资本结构保持30%的负债资本和70%的主权资本，明年计划增加资金500万元，今年年末采用剩余股利分配政策，那么，应从税后净利润中保留用于增加主权资本的数额为( )万元。
A. 150
B. 250
C. 350
D. 400
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信用证规定到期日为2004年5月31日，而未规定最迟装运期，按业务习惯通常可理解为( )。
A. 最迟装运期为2004年5月10日
B. 最迟装运期为2004年5月16日
C. 最迟装运期为2004年5月31日
D. 该信用证无效
The primary function of the passage as a whole is to
A. introduce a new explanation of a physical phenomenon
B. explain how a physical phenomenon is measured and described
C. illustrate the limitations of applying mathematics to complicated physical phenomena
D. indicate the direction that research into a particular physical phenomenon should take
E. clarify the differences between an old explanation of a physical phenomenon and a new model of it
According to the passage, European conquerors had which of the following advantages in North America
A. They possessed a larger population to replace casualties in their conquest of North America than they did in the South.
B. They had already gained experience in the Southern conquest that was not formerly available.
C. They had access to weaponry superior to that which was employed in the Southern conquest.
D. They were confronted by an opponent experienced in empire-building in North America.
E. They had better martial organization in North America than they had in South America.
According to the model presented in the passage, which of the following normally determines the initial height of a tsunami
A. The speed of the crustal plates that slip along each other in the imaginary fault plane
B. The vertical motion of the sea floor where the tsunami generates
C. The orientation of the assumed fault plane
D. The degree of refraction and shoaling
E. The presence of bumps and grooves on the seafloor
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