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【单选题】
诱发富山事件的主要污染物为
A.
Hg
B.
Pb
C.
Cd
D.
As
拍照语音搜题,微信中搜索"皮皮学"使用
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举一反三
【单选题】As president of the university, I welcome you to this campus. First of all, accept my congratulations on your ________ of years of hard work
A.
foundation
B.
triumph
C.
Faculties
D.
available
【单选题】A new __________ trend within the last decade culminated in the election of Donald Trump as president of the United States.
A.
hegemonic
B.
isolationist
C.
internationalist
D.
realist
【单选题】某医生预研究清肝活血颗粒治疗非酒精性脂肪肝的效果,将在该医院用清肝活血颗粒治疗的60例患者作为试验组,采用常规疗法的30例患者作为对照组,从而比较两种治疗方法的效果。该方案()。
A.
可行
B.
未遵循随机化原则
C.
对照组样本含量太小
D.
只需进行自身治疗前后对照
E.
对照设立不当,应设立空白对照
【单选题】最优关键字密度
A.
最多%1
B.
关键字越多越好
C.
没有密度也可以
D.
适当即可,2%-8%
【判断题】The Watergate scandal was a political scandal during the 1970’s which involved a break-in of the Republican National Committee headquarters at the Watergate Office Complex in Washington D.C. Soon afte...
A.
正确
B.
错误
【判断题】As president of the United States, Kennedy only addresses to the American people in his inaugural address.
A.
正确
B.
错误
【单选题】One of Ulyssed S. Grant’s first acts as President of the United States was to name the Seneca chief Donehogawa ______of Indian Affairs.
A.
as was Commissioner
B.
Commissioner
C.
was Commissioner
D.
him Commissioner
【单选题】重合配合关系比较常用,可以使一个零件的顶点、直线、平面与另外一个零件的顶点、直线、平面重合。这里的直线不包括( )
A.
边线
B.
轴线、临时轴线
C.
对称中心线
【判断题】一个零件的线与另一个零件的线可以重合
A.
正确
B.
错误
【单选题】最优关键字密度 ?
A.
2 %- 8 %
B.
页面内容保持正常,但是利用隐藏文字, alt 标签, meta 标签尽量多加关键字
C.
3%-7%
D.
不管关键字密度,搜索引擎不关心这个,只集中于内容,做到人们都爱链接你的页面
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