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.
【T7】
选项 A、 
B、 
C、 
答案B
解析 本题中空白处后紧接的是名词短语the worlds first microscopic blood-pressure sensor，介词短语用在此处不合适，故排除in some cases；剩余两项是动词形式，都可以接名词短语作宾语。从语义上看，located强调“确定……的位置”，常接表示位置意思的词，故可排除，故选perfected。
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