The amount of heat produced by this electrical apparatus is ______ at will by turning a small handle.

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问题 The amount of heat produced by this electrical apparatus is ______ at will by turning a small handle.

选项 A、different
B、diverse
C、variable
D、various

答案C

解析 本句的意思是:这台电器所产生的热量可以通过转动小手柄来随意调节。variable:可变的,易变的,用于此处意为“可调节的”;different:不同的;diverse:各种各样的,不同的,形容事物的多样性;various:不同的,各种各样的,指同一范畴内的各类。
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