时装制造商每年每季都不断推出新的流行款式,这种扩大市场需求总量的做法是()。
A.发现新用户
B.开辟新用途
C.提高市场占有率
D.增加使用量
参考答案:D
泵电机所用的额定电压为()伏。
In the foreign trade business, the payment is always made by L/C.In this sentence, L/C is the abbreviation for ______.
A.bill of Lading B.commercial InvoiceC.buying Contract D.letter of Credit