第13题: [单项选择]A" myograph" (Para. 2, Line 1) is an electronic instrument that______. A. is able to design new tools B. measure the amount of energy used C. enables people to see the muscular movements D. visualizes electrical signals 参考答案:C 答案解析:[分析] 本题考查利用上下文理解生词的能力。单词myograph所在的第二段说,这种仪器 makes visible through electrical signals the work done