题目内容：
What will happen to the blood vessels when stimulated by the sympathetic nervous system?（ ）
参考答案：
答案解析：
单选题：What will happen to the blood vessels when stimulated by the
- 题目分类：英语六级
- 题目类型：单选题
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在收入确认前发生的销售折让，应计入财务费用。 （ ）
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