A disc is a device made of metal or ceramic that fits snugly in the seat of a valve to control flow
A.
正确
B.
错误
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【单选题】You have just been asked out to dinner but you really don't want to go with the person who invited you. According to American English culture, you might say: ____________
【单选题】You have just been hired as a business consultant to determine what pricing policy would be appropriate in order to increase the total revenue of a bakery. The first step you would take would be to
A.
increase the price of every loaf of bread in the store.
B.
look for ways to cut costs and increase profit for the bakery.
C.
determine the price elasticity of demand for the bakery's products.
D.
determine the price elasticity of supply for the bakery’s products.