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【单选题】
关于半导体的晶体结构，以下说法中正确的是A.
硅是闪锌矿结构
B.
晶胞是晶体结构中最小的周期性重复单元
C.
单晶硅中原子排列整齐，各部分性质相同
D.
多晶硅中的原子排列杂乱无序，所以在集成电路制造过程中不使用
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【简答题】Cartels
【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.
【单选题】Cartels are:
A.
difficult to organize.
B.
difficult to preserve.
C.
especially unlikely to succeed if the members sell many varied products.
D.
all of the above.
【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).
【简答题】Cartels
【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】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
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