2. 考研
  3. A. marine B. have discovered C. slows Phrases: A. This turbulence muses friction and【T1】______the fish down B. Another kind of【

A. marine B. have discovered C. slows Phrases: A. This turbulence muses friction and【T1】______the fish down B. Another kind of【

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问题 A. marine B. have discovered C. slows
Phrases:
A. This turbulence muses friction and【T1】______the fish down
B. Another kind of【T2】______animals is dolphin
C. Biologists studying the dolphin【T3】______that
    【T4】______This seagoing mammal has been clocked at speed of 32 kilometers(20miles)an hour.【T5】______, like the shark, the animal’s efficient locomotion can be traced to its skin. A dolphin’s skin is made up in such a way that it offers very little resistance to the water flowing over it. Normally when a fish or other object moves slowly through the water, the water flows smoothly past the body. This smooth flow is known as laminar flow. However, at faster speeds the water becomes more turbulent along the moving fish.【T6】______
【T3】
选项 A、 
B、 
C、 
答案B
解析 因为这句话的主语是Biologists studying the dolphin，是表人物的复数名词，studying thedolphin是定语修饰Biologists，空格之后又有that，必然是引起一个宾语从句，只有填have discovered合适。故选B。
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