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【简答题】
我们常见的 50/125 (μ m )、 62.5/125 (μ m )之类的光纤标注,其中 50 或 62.5 表示 的是 ____ ,而 125 表示的是 ____ 。
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举一反三
【单选题】A paper published in Physics Today challenges how physics is taught and states that teaching fails to reveal the of our understanding.
A.
limitation
B.
boundary
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limits
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able
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alike
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equivalent
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sensible
B.
sensitive
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【简答题】完形填空。 Sometimes I really doubt whether there is love between my parents.They are very busy working to _1 the family.They don't act in the _2_ ways that I read in books or I see on TV. _3_ flowers to e...
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c. product characteristics and consumer needs
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【简答题】按照有效数字的运算规则，下列计算式的结果各应包括几位有效数字?
【单选题】To be well fit for the job, _____. [ ]
A.
a good knowledge of physics is needed
B.
one needs to have a good knowledge of physics
C.
it is required that one should have a good knowledge of physics
D.
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