單項(xiàng)選擇題

采用公開密鑰加密體制發(fā)送保密文件，（）

A.利用發(fā)送方的公鑰對(duì)數(shù)據(jù)加密
B．利用發(fā)送方的私鑰對(duì)數(shù)據(jù)加密
C．利用相同的密鑰進(jìn)行加密解密
D．利用接收方的公鑰對(duì)數(shù)據(jù)加密

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單項(xiàng)選擇題

患者男，77歲。因"反復(fù)雙下肢凹陷性水腫20余年，發(fā)作性呼吸困難、心悸7年，加重伴胸痛5天"入院。偶有咳嗽、咳痰，無吸煙病史，無高血壓病史。查體：T36.2℃，P110次／分，R22次／分，BP135／70mmHg，口唇發(fā)紺，雙肺呼吸音對(duì)稱，右下肺聞及濕啰音，頸靜脈充盈，劍突下心尖搏動(dòng)明顯，P2亢進(jìn)，三尖瓣區(qū)聞及收縮期雜音與舒張期奔馬律，雙下肢凹陷性水腫，右下肢為甚。
溶栓治療的絕對(duì)禁忌證（

A.2周以內(nèi)的大手術(shù)
B．2個(gè)月內(nèi)缺血性腦卒中
C．活動(dòng)性出血
D．近期自發(fā)性顱內(nèi)出血
E．10天內(nèi)的胃腸道出血
F．15天內(nèi)的嚴(yán)重創(chuàng)傷

A company currently uses a standard absorption costing system. The fixed overhead variances extracted from the operating statement for November are: $ Fixed production overhead expenditure variance 5,800 adverse Fixed production overhead capacity variance 4,200 favourable Fixed production overhead efficiency variance 1,400 adverse PQ Limited is considering using standard marginal costing as the basis for variance reporting in future. What variance for fixed production overhead would be shown in a marginal costing operating statement for November?
A、No variance would be shown for fixed production overhead
B、Expenditure variance: $5,800 adverse
C、Volume variance: $2,800 favourable
D、Total variance: $3,000 adverse

答案： A

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