54. What happens when sea levels rise in the Antarctic?
A) Many baby king penguins can't have food in time.
B) Many king penguins could no longer live on kill.
C) Whales will invade king penguins' breeding grounds.
D) Whales will have to travel long distances to find food.
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55. What do we learn about the Southern Ocean?
A) The king penguins there are reluctant to leave for new breeding grounds.
B) Its conservation is key to the sustainable propagation of Antarctic species.
C) It is most likely to become the ultimate retreat for species like the king penguin.
D) Only a few of its islands can serve as luge breeding grounds for king penguins.
下列变动成本差异,无法从生产过程中找到原因的是( )。
A. 变动制造费用耗费差异
B. 直接材料价格差异
C. 变动制造费用效率差异
D. 直接人工耗费差异
变动制造费用的价格差异即为
A. 效率差异
B. 耗用差异
C. 预算差异
D. 能力差异
变动制造费用的数量差异即为
A. 效率差异
B. 能量差异
C. 耗用差异
D. 预算差异
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