蒸汽锅炉按规定安设可靠的高低水位报警和自动()装置。
A.断水
B.补水
C.供水
参考答案:B
.
The doctor suggested that I should have a balanced diet ____ just protective food.
A.other than
B.more than
C.less than
D.rather than
尿毒症时电解质的变化哪项不正确
A.高钾血症
B.低钠血症
C.高镁血症
D.低磷血症
E.低钙血症