室上速时不适合直流电复律的情况是（）
A.低血压
B.应用洋地黄者
C.食管心房调搏无效时
D.严重心绞痛
E.充血性心力衰竭
参考答案：B
______ came that he and his girlfriend had broken up just because he didn’t keep his ______ again.
A．Word; words
B．Word; word
C．A word; word
D．A word; words
某企业对现有设备加装了数控系统以提高加工精度，这一措施属于 ______。
A．第一种有形磨损的局部补偿
B．第二种有形磨损的局部补偿
C．第二种无形磨损的局部补偿
D．第二种无形磨损的全部补偿
