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【简答题】
连续时间信号的自变量通常以什么表示?离散时间信号的自变量以什么表示?自变量的取值上有什么区别?
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举一反三
【简答题】If we guarantee an annual order of a certain amount, would you give us a special discount?
【简答题】She promised her brother that she______ (write) to him.
【判断题】Although Postscript is an afterthought and a sign of poor planning, we reserve the use of PS for information that we want to give very special emphasis.
A.
正确
B.
错误
【简答题】A．She had promised that she would. B．She has been sick. C．She needs his approval for her schedule. D．She must verify his plans.
【单选题】Proofread the following sentences. Identify the parts which are incorrect, and write down A,B,or C on the short lines below. On receiving orders for 12 pallets or much , we will give a special discoun...
A.
on
B.
or much
C.
of
【多选题】根据消费税法律制度的规定,下列关于消费税纳税义务发生时间的表述中,正确的有( )。
A.
采取赊销和分期收款结算方式的，为书面合同约定的收款日期的当天
B.
采取预收货款结算方式的，为收到预收货款的当天
C.
采取托收承付和委托银行收款方式的，为发出应税消费品并办妥托收手续的当天
D.
采取其他结算方式的，为收讫销售款或者取得索取销售款凭据的当天
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