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【单选题】
关于PMD色散，说法错误的是（）。A.
PMD色散解决办法之一是改进光纤工艺或在系统输入输出端插入偏振控制器
B.
PMD色散是无法通过补偿模块来补偿的
C.
PMD色散对40G系统影响较小
D.
PMD色散与光功率无关
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】The law of segregation
【简答题】减数后分离(post-meiotic segregation)
【单选题】肾小球毛细血管压和肾血流量保持相对恒定的动脉血压变动范围是()
A.
50-100mmHg
B.
60-140mmHg
C.
70-160mmHg
D.
80-180mmHg
E.
80-160mmHg
【简答题】Segregation law
【单选题】Resistance to the 1954 United States Supreme Court decision terminating segregation placed the schools in the middle of a bitter and sometimes violent dispute. By 1965, when a measure of genuine integ...
A.
social evils existing in the 1950s and 1960s
B.
reforms carried out in the educational system
C.
pressure for reforming the educational system
D.
discriminatory practices against the ethnic groups
【简答题】segregation( )
【单选题】Resistance to the 1954 United States Supreme Court decision terminating segregation placed the schools in the middle of a hitter and sometimes violent dispute. By 1965, when a measure of genuine integ...
A.
which children should attend what schools
B.
what kind of education schools should provide for children
C.
what kind of schooling was the most ideal
D.
how schools should achieve high academic performance
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