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【简答题】
光纤色散产生的原因及其危害是什么？
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反馈参考答案：
举一反三
【简答题】用力摁住伤口
【简答题】According to mechanism the polymerization can be classified into ______ and ______.
【单选题】In the United States, someone is classified as unemployed if he or she
A.
does not have a job.
B.
does not have a job, or else has a job but is looking for a different one while continuing to work.
C.
does not have a job, has recently looked for work, and is collecting unemployment insurance.
D.
does not have a job, and is collecting unemployment insurance.
E.
none of the above
【单选题】In the United States, someone is classified as unemployed if he or she
A.
does not have a job.
B.
does not have a job, or else has a job but is looking for a different one while continuing to work.
C.
does not have a job, has recently looked for work, and is collecting unemployment insurance.
D.
does not have a job, and is collecting unemployment insurance.
E.
none of the above
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