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判斷題

常見(jiàn)有機(jī)化合物基團(tuán)頻率出現(xiàn)的范圍是4000-670cm-1

答案：正確

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單項(xiàng)選擇題

When a country under a fixed exchange rate regime has a deficit in the balance of payments, the monetary authority could change in money supply, and further affect economic indicators via the followin

A.price
B.income
C.interest
D.currency-price

單項(xiàng)選擇題

A country with a surplus in the balance of payments may（）

A.increase
B.enhance
C.raise
D.improve

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