2. 考研
  3. A. in some cases B. perfected C. located A. 【T7】________the world’ s first microscopic blood-pressure sensor B. 【T8】________d

A. in some cases B. perfected C. located A. 【T7】________the world’ s first microscopic blood-pressure sensor B. 【T8】________d

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问题 A.  in some cases
B.  perfected
C.  located
A. 【T7】________the world’ s first microscopic blood-pressure sensor
B. 【T8】________deep within a high-rise apartment building
C. that allows scientists to envision and【T9】________actually build microscopic machines
    In the past, one of the biggest disadvantages of machines has been their inability to work on a micro scale. For example, doctors did not have devices allowing them to go inside the human body to detect health problems or to perform delicate surgery. Repair crews did not have a way of identifying broken pipes【T10】________However, that’ s about to change. Advances in computers and biophysics have started a micro miniature revolution【T11】________These devices promise to dramatically change the way we live and work.
    Micromachines already are making an impact. At Case Western Reserve University in Cleveland, Ohio, research scientists have designed a 4-inch silicon chip that holds 700 tiny primitive motors. At Lucas Nova Sensor in Fremont, California, scientists have【T12】________. Threaded through a person’ s blood vessels, the sensor can provide blood pressure readings at the valve of the heart itself.
【T12】
选项 A、 
B、 
C、 
答案A
解析 本题已经给出主语scientists和部分谓语have，A选项的“perfected the world’s first microscopic blood—pressure sensor”在语法上能够与之衔接，而且blood-pressure，sensor等词汇在下文中均有复现，意思也与下文连贯，故选A。
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