单项选择题

Industrial output has grown by an average of（）annually since tariff barriers were eliminated in 1977.

A.3%
B.5%
C.8%
D.10%

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单项选择题
Sine the 1960s,（）has become the mainstay of the Irish economy.

A.manufacturing　
B.mining
C.energy　
D.animal husbandry
单项选择题
In Ireland the agricultural enterprise producing the most income is（）.

A.forestry　
B.vegetable growing
C.sugar refining　
D.animal husbandry
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