属于缺陷病毒的为() A.HBV B.HAV C.HCV D.HDV E.HEV

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问题:

属于缺陷病毒的为()

A.HBV

B.HAV

C.HCV

D.HDV

E.HEV

考点:营养与食品卫生(医学高级)医学微生物学医学微生物学题库
题型:单项选择题

一圆形线圈位于一电磁感应强度随时间t变化的磁场内,设磁场方向垂直线圈所在的平面(纸面)向里为正,如图甲所示,磁感应强度B随t的变化规律如图乙所示。以i表示线圈中的感应电流,以图甲中线圈上箭头所示方向的电流为正,则以下的i-t图中正确的是

[ ]

A.

B.

C.

D.

题型:单项选择题

 Political and demographic changes within Europe, as well as the United States, also ensure that the transatlantic alliance will lose prominence. In Europe, the E.U. project still consumes the attention of many, but for others, especially those in southern Europe facing unsustainable fiscal shortfalls, domestic economic turmoil takes precedence. No doubt, Europe’s security challenges are geographically, politically and psychologically less immediate to the population than its economic ones. Mounting financial problems and the imperative to cut deficits are sure to limit what Europeans can do militarily beyond their continent. It is true that the era in which Europe and transatlantic relations dominated U.S. foreign policy is over.

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各地区、各有关部门和单位要把人民防空法制教育纳入(),广泛开展社区和企事业单位人民防空宣传教育活动,增强群众的国防观念和人民防空意识。

A、全民法制宣传教育

B、全民国防教育

C、全民科学素质行动计划纲要

D、全民安全教育

题型:单项选择题

男性,30岁,因急性肾衰竭导致高钾血症,其心电图检查结果中不符合该诊断的是()

A.出现U波

B.T波高尖

C.PR间期延长

D.P波消失

E.ST段抬高

题型:单项选择题

在电流表电路中串联一个电阻时,或在电压表的两个端钮之间并联一个电阻时,()。

A.对仪表本身的误差并无影响,只对测量电路有影响

B.对仪表本身的误差并无影响,对测量电路也无影响

C.对仪表本身的误差有影响,对测量电路也有影响

D.对仪表本身的误差有影响,对测量电路无影响

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