室间隔缺损与传导系统最近邻的类型是()
A.膜周部室间隔缺损
B.肌部室间隔缺损
C.心尖部室间隔缺损
D.肺动脉瓣下室间隔缺损
E.嵴内室间隔缺损
参考答案:A
The president spoke at the business meeting for nearly an hour without _______ his notes.
A.bringing up
B.referring to
C.looking for
D.trying on
在使用热效式瓦检器,如被测地点空气中一氧化碳含量高,会造成测定结果()。
A、偏低
B、不影响
C、可能高也可能低
D、偏高