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【单选题】
OSI参考模型是国际标准化组织制定的模型,把计算机与计算机之间的通信分成 ( )个互相连接的协议层
A.
7
B.
5
C.
6
D.
8
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【单选题】某溶液的pH为9.180,其氢离子活度为
A.
610-10
B.
6.610-10
C.
6.6110-10
D.
6.60710-10
【单选题】The director made the demand that she __________ the dangerous place as soon as possible.
A.
left
B.
would leave
C.
leave
D.
was leaving
【简答题】什么是工厂化蔬菜育苗?
【简答题】A.She used to serve as WHO Assistant Director-General. B.She led the research of drugs against SARS. C.She helped provide new services to pr diseases and promote better health. D.She helped conta...
【简答题】生物半减期____是指化学物质吸收入体内以后,在体内每减少一半____所需的时间。
【单选题】网店中有20个单品,其中15个在本月份有销售记录,请问网店的商品动销率是多少?
A.
75%
B.
25%
C.
50%
D.
80%
【简答题】测得某溶液的pH值为6.0,其氢离子活度为______mol/L,该溶液pOH值应为______。
【单选题】框架式自动空气断路器合不上闸的可能原因包括:_____。
A.
主触头烧坏,其动、静触头不接触
B.
失压脱扣器不动作
C.
脱扣机构磨损严重,钩不住
D.
(A+C)
【单选题】The director will by no means turn the actress away all she is considered the most qualified for the role.
A.
because of
B.
regardless of
C.
in spite of
D.
despite of
【简答题】A.She applied for the position on the advertisement. B.The director of the company offered her the position. C.She joined it through an examination. D.Her dance director recommended her.
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