慢性肺心病导致心力衰竭的原因中以下最重要的是
A．肺动脉压升高，超过右心负荷
B．缺氧
C．血容量增多
D．黏稠度增高
E．反复肺部感染
参考答案：A
浆膜下子宫肌瘤的临床表现是( )
A．下腹部包块
B．贫血
C． * * 不规则出血
D．白带增多
E．下腹坠痛
Eddie is eight years old, but we have seven candles only, we need __________ candle.[ ]
A. only one
B. one more
C. some more
D. one much
