问题
单项选择题
节能灯所需要的电能少，比较省电，所以，如果人们都只用节能灯，不用耗电多的普通白炽灯，那就会节省不少电费。以下哪项陈述是上面论证所依赖的假设？
A．人们少用电就可以减少环境污染。
B．人们总想减少电费、水费等等。
C．节能灯不比普通白炽灯便宜。
D．节能灯的亮度至少与普通白炽灯一样。
答案
参考答案：D
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节能灯所需要的电能少，比较省电，所以，如果人们都只用节能灯，不用耗电多的普通白炽灯，那就会节省不少电费。以下哪项陈述是上面论证所依赖的假设？
A．人们少用电就可以减少环境污染。
B．人们总想减少电费、水费等等。
C．节能灯不比普通白炽灯便宜。
D．节能灯的亮度至少与普通白炽灯一样。
参考答案：D
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