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【单选题】
瞳孔直径的正常范围()A.
1.5~2mm
B.
2~5mm
C.
3.5~4mm
D.
4.5~5mm
E.
5.5~6mm
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举一反三
【单选题】What is the current situation?
A.
Drug cartels gave up the attack.
B.
No evidence is provided to support the charge.
C.
Nahum Acosta is released now.
D.
The President canceled the travel plan.
【简答题】呼吸与呼吸暂停交替出现称为___呼吸。
【单选题】Cartels are difficult to maintain because:
A.
there are generally few barriers to entry in oligopoly markets.
B.
firms have a strong private incentive to cheat on agreements.
C.
it is difficult to enforce a cartel agreement.
D.
both (b) and (c).
【单选题】Industry cartels never:
A.
give rise to price supports.
B.
spur entry when barriers to entry are low.
C.
spur exit when exit barriers are low.
D.
prompt inefficiency and waste.
【单选题】Cartels are thought to be inherently unstable because:
A.
the costs of enforcing cartel agreements are very low.
B.
each cartel member can privately profit from increasing production beyond agreed-upon levels.
C.
customers force cartel members to increase production and reduce prices.
D.
cartel agreements are legally binding and can be upheld in court.
【单选题】OPECs announcement about the cartels promise to add more barrels to production______
A.
is not only good news for OPEC, but good news for the New York Mercantile Exchange as well
B.
has been dismissed by the Market
C.
is the main reason the OPEC ministers took jets back home
D.
proves that OPEC has lost its power to control the Market
【单选题】Cartels usually succumb to divisive forces caused by:
A.
stringent enforcement of a cartel agreement.
B.
the similarity of production costs across member firms.
C.
members cheating by giving secret discounts.
D.
insufficient profits compared to independent operations.
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