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( ) A. 对 B. 错

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单项选择题Suppose roses are currently selling for 30 per dozen. We would expect a A、shortage to exist and the market price of roses to increase. B、shortage to exist and the market price of roses to decrease. C、surplus to exist and the market price of roses to increase. D、surplus to exist and the market price of roses to decrease.

单项选择题‍The current flows through the load resistor in this circuit during the ____.‍ ‍‍