constant,continual,continous区别
The road lay ahead of her,a( )gray line stretching to the horizon. a.constant b.continual c.continuous d.consistent
应该选C。 前三个选项的确容易混淆，现分别用英文解释一下： Constant describes something happening regularly or all the time. Continual describes separate, often annoying, actons which are repeated over a period of time. Continuous describes thing and events that go on without stopping or without being interrupted. 而consistent则是侧重于“前后一致、言行相符”的抽象意思。 由此可见，此处是指道路延伸而无中断，故选C。
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