下列表中括号内的物质为所含的少量杂质,请选用适当的试剂和分离装置将杂质除去,将所

题型:填空题

问题:

下列表中括号内的物质为所含的少量杂质,请选用适当的试剂和分离装置将杂质除去,将所选的试剂及装置的编号填入表中,

试剂:a水,b氢氧化钠溶液,c食盐,d溴水,e新制生石灰,f溴的四氯化碳溶液,g饱和碳酸钠溶液

分离装置:A分液装置,B过滤装置,C蒸馏装置,D洗气装置

考点:物质的除杂
题型:填空题
此题要求改正所给短文中的错误。对标有题号的每一行做出判断:如无错误,在该行右边横线上划一勾(√)如有错误(每行只有一个错误),则按下列情况改正:该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。该行缺一个词:在缺词处加一个漏字符号(∧):在该行右边横线上写出该加点的词。该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词
Tom was having much troubles getting up in the morning and was always late with work.. His boss wanted to fire him if he didn’t start coming on time, but he went to the doctor for a help. The doctor gave him some medicine and told him to take them before he went to bed. The man did as told and slept really well, wake up before the alarm had even gone off. He had time for a properly breakfast and was still the first reach the factory.“Boss,” he said ,”that medicine really works!””I’m pleasing to hear it ,”said his boss,” but where were you yesterday?”
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题型:填空题

根据《UCP500》,信用证中货物的数量规定有“约”、“大约”、“近似”或类似意义的词语时,应理解为其有关数量增减幅度不超过( )。

A.3%

B.5%

C.10%

D.15%

题型:填空题

细胞遗传学检查主要适用于哪种遗传病的诊断

A.单基因病

B.多基因病

C.染色体病

D.体细胞遗传病

E.以上都不是

题型:填空题

车辆绩效考核可以分为固定绩效考核部分和变动绩效考核部分,其中变动绩效考核部分一般占到总考核的60%~70%。

题型:填空题

软件的( )一般由两次故障平均时间和故障平均恢复时间来衡量。

A.可维护性

B.可靠性

C.效率

D.互理解性

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