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【单选题】
针对老年性高血压,下列描述不正确的是( )A.
降压目标是140/90mmHg
B.
钙离子拮抗剂单药降压幅度最大
C.
多为收缩期单纯高血压
D.
适合使用利尿剂
E.
须注意直立性低血压的出现
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【单选题】Now _____ understanding of climate change is no longer limited to ____ small group of scientists or environmentalists.
A.
/ ; a
B.
an ; a
C.
the ; the
D.
a ; /
【单选题】糖尿病常有各种并发症，下列哪项不属于微血管病变（）。
A.
糖尿病视网膜病变
B.
糖尿病性周围神经病变
C.
糖尿病肾病
D.
动脉粥样硬化性心脏病
E.
糖尿病性自主神经病变
【简答题】采用页式存储管理的系统中,若逻辑地址中的页号用8位表示,页内地址用16位表示,则用户程序的最大长度可为2的_____次方字节,主存分块大小为2的______次方字节。
【简答题】在页式存储管理系统中,逻辑地址长度为16位,页面大小1KB,一作业有7个页面,设0,1,2,3分别装入主存中的4,7,5,8物理块内。试问: 若作业页面走向为0,1,2,3,4,1,2,5,1,2,3,5,2,6,1,3;采用最近最久未使用LRU算法来处理缺页中断,试计算缺页中断次数及缺页中断率。
【单选题】According to the passage, the dynamics of small group economies differ from those of large group economies in that
A.
the members of small groups tend to have a greater degree of social regularity than the members of large groups
B.
people in small groups carry an advantage in the arena of exchange because they are tied by social obligation
C.
the manufacturer of a commodity in a small group economy is more likely to be known by the members of the group
D.
the people who contribute to the production of a gift are less essential to small groups than those who exchange commodities are in large groups
E.
a system of social obligation diminishes the number of parties necessary to a gift-giving transaction
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