闭合性气胸的诊断要点为()。
A.胸闷气促
B.伤侧呼吸运动减弱
C.叩诊呈鼓音
D.呼吸音及语颤减弱或消失
E.严重的呼吸困难
参考答案:A, B, C, D
The young man made a ________ to his parents that he would try to earn his own living after graduation.[ ]
A.prediction
B.promise
C.plan
D.contribution
对二次电流为5A、额定负荷为10VA或5VA的电流互感器,其下限负荷允许为(),但在铭牌上必须标注。
A.1.25VA
B.2.5VA
C.3.75VA
D.4.15VA