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【单选题】
关于数据库文件的存储描述不正确的是( )。A.
每个数据库有且仅有一个主要数据文件
B.
每个数据库允许有多个主要数据文件
C.
每个数据库至少有一个日志文件
D.
每个数据库可以没有次要数据文件
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举一反三
【单选题】A problem encountered when implementing an "infant industry" tariff is that
A.
domestic consumers will purchase the foreign good regardless of the tariff.
B.
the industry may never "mature."
C.
most industries require tariff protection when they are mature.
D.
the tariff may hurt the industry's domestic sales.
E.
the tariffs fail to protect the domestic producers.
【单选题】A problem encountered when implementing an "infant industry" tariff is that:
A.
Domestic consumers will purchase the foreign good regardless of the tariff
B.
Political pressure may prevent the tariff's removal when the industry matures
C.
Most industries require tariff protection when they are mature
D.
Labor unions will capture the protective effect in higher wages
【单选题】Suppliers in an industry are most powerful when:
A.
there are few substitutes for the products that they sell.
B.
switching costs are low.
C.
companies in the industry threaten to enter the suppliers' industry.
D.
their profitability is significantly affected by the purchases of companies in a particular industry.
E.
they refrain from entering their customers' industry because of lack of resources.
【简答题】在各种资金来源中，凡是须支付固定性占用费的资金都能产生财务杠杆作用。（ ）
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