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【单选题】
设 P 是 8 维空间中含有 30 个向量的向量组,则 P 中的最大线性无关向量组最多含有 ( ) 个向量
A.
22
B.
30
C.
8
D.
38
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【简答题】A.The news offers easy information that doesn't mean much to you. B.The news makes you feel like you're learning, but actually you're not. C.The news is just another popular entertainment program like...
【判断题】演讲稿要对“境”具体、细致、生动、形象地描写刻画,达到由境及情,演讲的情感才会充盈、流畅、真挚。
A.
正确
B.
错误
【判断题】在色彩搭配不当的空间中长期生活会造起人们生理上的不适从而引发疾病。
A.
正确
B.
错误
【单选题】By describing news as 'machine-gunning with scraps', the author means______.
A.
much of the news contains gun-fighting scenes
B.
much of the news program is only a rapid broadcast of unrelated bits of information
C.
news programs are repeated too frequently on the screen
D.
news programs can't capture and hold viewers' attention
【单选题】下列哪种是实验室暴露的常见原因:
A.
因个人防护缺陷而吸入致病因子或含感染性生物因子的气溶胶;
B.
被污染的注射器或实验器皿、玻璃制品等锐器刺伤、扎伤、割伤;
C.
在生物安全柜内加样、移液等操作过程中,感染性材料洒溢;
D.
在感染性材料及致病因子实验过程中发生离心管破裂、致病因子外溢导致实验人员暴露
【单选题】对于实验室的微波炉,下列哪种说法是错的?
A.
实验室的微波炉也可加热食品
B.
微波炉开启后,会产生很强的电磁辐射,操作人员应远离
C.
严禁将易燃易爆等危险化学品放入微波炉中加热
D.
对密闭压力容器使用微波炉加热时应注意严格按照安全规范操作
【判断题】演讲稿要对“境”具体、细致、生动、形象地描写刻画,达到由境及情,演讲的情感才会充盈、流畅、真挚。
A.
正确
B.
错误
【简答题】There was simply too much news and too much information freely available on the net.But was it accurate? Whose opinion should we trust? A survey found that 60% of UK s think it is worth paying fo...
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A.
正确
B.
错误
【简答题】The family ______ (be)much pleased about the news of his entry of college.
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