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【单选题】
俯卧位,两手抱头后,脐以上身体在桌缘外,固定两下肢,伸直脊柱使上身凌空或水平位,维持此姿势的时间超过( ),腰背肌肌力为正常A.
15秒
B.
30秒
C.
45秒
D.
60秒
E.
上均不是
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皮皮学刷刷变学霸
举一反三
【简答题】6.2. The speaker does not
mentionA. taking a taxi. B. taking an airport
shuttle bus. C. taking a trolley bus. D. taking an airport
subway.
【简答题】刀具使用寿命是指刀具从开始切削至达到 为止所使用的切削时间,用 T 表示。
【单选题】One of the things the speaker does NOT remember about the street is that ______.
A.
garbage cans were kept from the street
B.
cars were moving slowly in the street
C.
policeman patrolled the street
D.
pedestrians passed by
【单选题】The speaker does not mention
A.
taking a taxi.
B.
taking an airport shuttle bus.
C.
taking a trolley bus.
D.
taking an airport subway.
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