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问题 单项选择题

现行的《地表水环境质量标准》依据地表水水域环境功能和保护目标，按功能高低将地表水水域依次划分为五类，其中Ⅱ类不适用的水域是( )。

A．集中式生活饮用水地表水源地一级保护区
B．游泳区
C．珍稀水生生物栖息地
D．鱼虾类产卵场

答案

参考答案：B

解答题

一斤苹果三元钱，21元可以买几斤苹果？
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补全对话，情景问答
根据对话内容，选择适当的句子补全对话。
A. By bike or by bus.
B. Nobody, I think.
C. Fine, thanks.
D. By bike. But my bike is broken today.
E. Most of them live near our school, so they usually walk.
Jim: Hello, Ann. How are you?
Ann:   1  
Jim: How do you usually come to school?
Ann:   2    
Jim: I'm sorry to hear that. How do most students in your class come to school?
Ann:   3  
Jim: What about the other students?
Ann:   4  
Jim: Is there anybody by car?
Ann:   5    
1._____ 2._____ 3._____ 4._____ 5._____
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