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阅读以下说明和流程图，回答问题1至问题3，将解答写在对应栏内。 【说明】 (1)流程图描述某大型商店商品销售的数据处理流程。 (2)商店设有若干柜台，同一种商品可能在几个柜台上销售，各柜台每天提供一组日销售数据，其格式如下： 日期、柜台号、商品代码、销售数量、商品代码、销售数量…… (3)数据处理系统每日产生一份反映各柜台当日销售金额和商店日销售金额的“日销售金额报告”，必要产生一份“商品请购报告”，给出那些低于最低库存量的商品代码、商品名称、最低库存量和实际库存量。处理过程中产生存档的“日销售文件”和临时工作文件“日销售量文件”和“旧销售金额文件”。 (4)系统中所用到的数据均来自数据文件。 (5)流程图中的商品库存文件的记录已按关键字“商品代码”排序。 ①指出商品库存文件的记录中必须包括哪些数据项? ②分别指出在日销售文件，日销售量文件和日销售金额文件的记录中至少应包括哪些数据项，同时不产生数据冗余? ③错误清单可能指出哪些错误?
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举一反三
【简答题】At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _________ to another subject. A) committed B) switched C) favore...
【单选题】They suggested that the professor ________ just now ________ chairman of the meeting.
A.
referring to；was made
B.
referring to；be made
C.
referred to；be made
D.
referred to；was made
【单选题】The director thought I was referring to her, in fact, I was referring to the men on duty.
A.
when
B.
where
C.
which
D.
while
【简答题】At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _________ to another subject. A) committed B) switched C) favoured D) transmitte...
【单选题】It is requested that the reporter _______ to blame for the wrong report.
A.
referring to
B.
referring to be
C.
referred to be
D.
referred to being
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