皮皮学，免费搜题
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搜题
【单选题】
CT滤作用的关键在于A.
吸收低能量X线
B.
优化射线的能谱
C.
减少患者照射剂量
D.
使射线能量分布均匀
E.
使射线近似单一性
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】手术病人一般在术前12h开始禁食、4h开始禁饮的理由是
A.
让胃肠道适当的休息
B.
防止麻醉或手术过程中发生呕吐
C.
减少胃肠道手术时的污染
D.
防止术后腹胀
E.
减少术后排便
【单选题】Researchers put patients through a set of psychological tests to determine the negative consequences of sleep ________.
A.
deficit
B.
deform
C.
depress
D.
distress
【单选题】Researchers put patients through a set of psychological tests to determine the negative consequence of sleep _____.
A.
deficit
B.
efficiency
C.
proficiency
D.
exposure
【单选题】Researchers put patients through a set of psychological tests to determine the negative consequences of sleep ______.
A.
precise
B.
deficit
【简答题】Researchers put patients through a set of psychological teste to determine the negative consequences of sleep ____.
【单选题】手术病人一般在术前12h开始禁食、4h开始禁饮的理由是
A.
防治术后腹胀
B.
减少术后排便
C.
让胃肠道适当的休息
D.
减少胃肠道手术时的污染
E.
防治麻醉或手术过程中发生呕吐
【单选题】With all the food supply ___, the researchers had to put an end to the wildlife protection project and returned home.
A.
running out
B.
to use up
C.
run out of
D.
using up
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