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王老师:19139051760(拨打)
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第1题

一袋中有两个黑球和若干个白球,现有放回地摸球4次,若至少摸到一个白球的概率为80/81,则袋中白球数是( ) A、2 B、4 C、6 D、8
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第2题

Feeling that the directions for the exercise were difficult to understand, the students asked the teacher to_______them
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第3题

Thought he walked free from court, his_________ kept bothering him for the wrong doing he had done. ______
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第4题

_______ _________________, the project will mainly focus on Java, where most of the human deaths have occurred.
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