题目内容
预应力混凝土用钢棒按表面形状分为______、______、______、______四种。
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可以通过______快捷键或______快捷键退出Visual Basic。
Section A In this section, you will hear five short conversations. Each conversation will be read only once. At the end of each conversation, there will be a pause. During the pause, read the question with three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the centre. What does the man say about Mark
Visual Basic 6.0分为3种版本，这3种版本是______、______和______。其中，最完整的是______。
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