第30题: [单项选择]A "myograph" (Para. 2, Line 1) is an electronic instrument that __________. A. is able to design new tools B. measures the amount of energy used C. enable people to see the muscular movements D. visualizes electrical signals 参考答案:C 答案解析:本题考察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make visible through electrical signals the work done by huma