题目内容

Determinant positive standard of bronchial dilation test is()

A. FEV1 improved rate≥12%
B. FEV1 improved rate≥300ml
C. FEV1 improved rate≥18%
D. FEV1 improved rate≤200ml
E. FEV1 improved rate≥20%

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Which is not tumors markers?()

A. carcinoembryonic antigen ( CEA)
B. CA 15-3
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D. LDH
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which is not the symptom of COPD?()

A. excessive cough
B. sputum production
C. shortness of breath
D. weight loss
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