题目内容

Your letter of May 9 addressed to our Wuhan Branch Office has _____ to us for attention and reply.

A. been passed on
B. passed
C. passed on
D. been past through

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Now we look your company for the supplies as we _ suffer great losses when we dealt with them.

A. to, would
B. for, are used to
C. for, would
D. to, used to

The Guangzhou Export Commodities Fair, sometimes known as the Canton Fair, has _______ to offer that you can find almost everything.

A. so many
B. more
C. so much
D. most

顺序状态转移图的三要素包括：

A. 功能状态
B. 转移条件
C. 转移时间
D. 转移方向

顺序状态转移图（SFC）按其结构特点，主要包括以下哪几种结构类型？

A. 拓扑结构
B. 单流程结构
C. 选择性分支结构
D. 并行分支结构