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【单选题】
If the perfectly competitive wiffle ball industry is bearing economic losses, we would expect that:A.
output will increase, the price of wiffle balls will rise, and the economic losses would tend to disappear.
B.
output will decrease, the price of wiffle balls will fall, and the economic losses would tend to increase.
C.
output will decrease, the price of wiffle balls will rise, and the economic losses would tend to disappear.
D.
output will increase, the price of wiffle balls will fall, and the economic losses would tend to disappear.
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A.
将床尾抬高 １５~３０ ｃｍ
B.
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嘱患者及家属不要擅自改变体位和增减牵引重量
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定时测肢体长度
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将床尾抬高15～30cm
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嘱患者及家属不要擅自改变体位和增减牵引重量
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定时测肢体长度
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保持牵引锤悬空、滑车灵活
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