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【单选题】
One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）A.
uses undo data for roll forward
B.
uses Flashback Log for recovery
C.
uses online redo logs to roll back
D.
uses undo data to roll back the transaction
E.
uses Recovery Manager （RMAN） to roll back
F.
uses the System Monitor （SMON） background process to perform instance recovery
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【单选题】Which of the following conditions is NOT necessary for immiserizing growth to arise in a country?
A.
a. The country's growth must be strongly biased toward expanding the country's supply of exports and the increase in exports must be large enough to have a noticeable impact on world prices.
B.
b. The foreign demand for the country's exports must be price inelastic so that an expansion in the country's export supply leads to a large drop in the international price of the export product.
C.
c. Before the growth, the country must be heavily engaged in trade so that the welfare loss from the decline in the terms of trade is great enough to offset the gains from being able to produce more.
D.
d. The country must specialize in the production of a single exportable good and import all the other goods consumed in the economy.
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