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不定项选择
因子旋转一定有利于因子的解释。
A．错误
B．正确
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感应同步器滑尺上的两个激磁绕组在长度方向相差: A.
2 个节距 B.
1/2个节距 C.
4个节距 D.
1/4个节距
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Over a million people visit Hawaii (夏威夷) each year because of its beautiful weather and wonderful scenery. The Hawaii islands have very mild temperatures. For instance, August, the hottest month, average 78.4°F, while February, the coldest month, averages 71.9°F.In addition, the rainfall in Hawaii is not very heavy because mountains on the northern side of each island stop incoming storms; for example, Honolulu averages only 23 inches of rain per year. The beautiful weather helps tourists to enjoy Hawaii's wonderful natural scenery, from mountain waterfalls to fields of flowers and fruits. And Hawaii's beautiful beaches are everywhere--.from the lovely Kona coast beaches on the large island of Hawaii to Waikiki Beach on Oahu. Warm sunshine and beautiful beaches--it is not surprising that so many people visit Hawaii each year. Are you going to join us? Don't miss the chance!
Hawaii
Famous for its (46) and (47) .
Average temperature: range from 71.9°F to (48) .
Annual rainfall in Honolulu: (49) .
Attractions for tourists: the beautiful weather and (50) .
不定项选择
频域分析方法是从序列自相关的角度揭示时间序列的发展规律。（ ）
A．错误
B．正确
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