单项选择题
胶砂养护期间试件之间间隔或试体上表面的水深不得小于( )
A．.20mm
B．15mm
C．10mm
D．5mm
胶砂养护期间试件之间间隔或试体上表面的水深不得小于( )
A．.20mm
B．15mm
C．10mm
D．5mm
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单项选择题
A 45-year-old woman has had worsening shortness of breath for 3 years.She now has to sleep sitting up on two pillows.She has had difficulty swallowing for the past year.She has no history of chest pain.A month ago, she had a "stroke" with resultant inability to move her left arm.A chest radiograph reveals a near-normal left ventricular size with a prominent left atrium and enlarged right ventricle.There is marked pulmonary edema.Which of the following conditions is most likely to account for her findings? ()
A 45-year-old woman has had worsening shortness of breath for 3 years.She now has to sleep sitting up on two pillows.She has had difficulty swallowing for the past year.She has no history of chest pain.A month ago, she had a "stroke" with resultant inability to move her left arm.A chest radiograph reveals a near-normal left ventricular size with a prominent left atrium and enlarged right ventricle.There is marked pulmonary edema.Which of the following conditions is most likely to account for her findings? ()
A．Essential
hypertension
B．Cardiomyopathy
C．Mitral
valve stenosis
D．Aortic
coarctation
E．Patent
foramen ovale