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当前学科：地铁车辆检修员中级
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每个APU上有（）个连接器插头。
A . A、4
B . B、3
C . C、3
D . D、1
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The popularity of tattoos did not 11____ into the 20th century; it slowed down and continued only among soldiers and sailors. These men 12____ each other to get tattooed to show how strong they were. As a result, the general public , began to think of people with tattoos as from the lower classes. However, in the late 20th century , a new 13____ appeared as young people started to get tattooed. This body art 14____ began to appear in unusual places , not only on arms , but also on legs and backs. Tattoo artists began to 15____ in new equipment, ink, and designs. To keep their 16____ , they opened shops in fashionable places where they could make greater 17____. Actors and musicians got "tats ," and many 18____ words came into use. As people became more 19____ about this form. of body art, tattoos became more 20____ because patterns , or "flash," were more complex. Despite this enthusiasm, however, the trend has begun to slow down, and soon it may be a thing of the past.
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