单项选择题 企业所有采购申请书必须先由（     ）签名批准。 A. 董事长   B. 总经理 C. 采购经理 D. 部门主管

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单项选择题 Using evidence is especially critical in a persuasive speech when your target audience __________. A. is apathetic about your point of view B. is neutral toward your point of view C. opposes your point of view D. supports your point of view