Not until the First World War ______ to improve the road system in the United States.
A.a determined effort was made
B.made a determined effort
C.when a determined effort was made
D.was a determined effort made
第4题
心室扩大早期,泵血功能减退时,宜选用的评定指标是
A.每搏输出量
B.心脏作功量
C.射血分数
D.心指数
第6题
在心室扩大、泵血功能减退早期宜选用的评定指标是
A.搏出量
B.心输出量
C.射血分数
D.静息心指数
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