城市环境噪声区域3类标准适用于( )。 A．工业 B．居住区 C．校园 D． 发布时间：2018-06-12 10:21 │ 来源：www.tikuol.com 题型：单项选择题 问题： 城市环境噪声区域3类标准适用于( )。A．工业 B．居住区 C．校园 D．疗养区
题型：单项选择题 为下列问句选择正确答案。( ) 1. May I help you? ( ) 2. What are you doing? ( ) 3. How many pairs of socks do you have? ( ) 4. Do you want this jacket? ( ) 5. What colour is it?A. It's red. B. I'm packing my suitcase. C. I have one pair of socks. D. No, thanks. I want that jacket, please.E. Sure. 查看答案