皮皮学，免费搜题
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搜题
【单选题】
提示溃疡病急性穿孔最有价值的体征是A.
上腹痛加剧
B.
腹肌紧张
C.
体克征象
D.
疼痛节律性消失
E.
肝浊音界消失
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】If a small change in price will lead to an infinite change in the quantity demanded, then the demand curve is:
A.
Perfectly elastic.
B.
Perfectly inelastic.
C.
Downward sloping.
D.
non-linear
【单选题】If a small change in price will lead to an infinite change in the quantity demanded, then the demand curve is:
A.
horizontal.
B.
vertical.
C.
inclined.
D.
non-linear.
【判断题】If a huge percentage change in price leads to a small percentage change in quantity demanded, then demand is said to be elastic.
A.
正确
B.
错误
【单选题】To represent each CD-quality sample point, CD-quality quantization uses bits.
A.
9
B.
17
C.
25
D.
33
【简答题】Fill in each of the blanks with one of the words given in the following list, changes if necessary: commercial dis c floppy optical retrieve erased flat suce access store laser information l...
【判断题】If a huge percentage change in price leads to a small percentage change in quantity demanded, then demand is said to be inelastic.
A.
正确
B.
错误
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