2. 考研
  3. Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human "guinea p

Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human "guinea p

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问题     Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human "guinea pig" is tested using a regular tool. Measurements are taken of the amount of work done, and the buildup of heat in the body. Twisted joints and stretched muscles cannot perform as well, it has been found, as joints and muscles in their normal positions. The same person is then tested again, using a tool design according to the suggestions made by Dr. Tichauer. All these tests have shown the great improvement of the new designs over the old.
    One of the electronic instruments used by Dr. Tichauer, the myograph, makes visible through electrical signals the work done by human muscle.
    Another machine measures any dangerous features of tools, thus proving information upon which to base a new design. One conclusion of tests made with this machine is that a tripod stepladder is more stable and safer to use than one with four legs.
    This work has attracted the attention of efficiency experts and time-and-motion-study engineer, but its value goes far beyond that. Dr. Tichauer’s first thought is for the health of the tool user. With the repeated use of the same tool all day long on production lines and in other jobs, even light manual work can put a heavy stress on one small area of the body. In time, such stress can cause a disabling disease. Furthermore, muscle fatigue is a serious safety hazard.
    Efficiency is the by-product of comfort, Dr. Tichauer believes, and his new designs for traditional tools have proved his point.
A "myograph" (Para. 2) is an electronic instrument that________.
选项 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
答案C
解析 事实细节题。the myograph之后make引导的后置定语解释the myograph的具体功能，即通过电信号使人类肌肉所做的工作可见。故C项为答案。
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