有一组多项式：a+b2，a2﹣b4，a3+b6，a4﹣b8，…，请观察它们的构成规律，用你发现的规律写出第10个多项式为_1．_刷题宝

题干

有一组多项式：a+b²，a²﹣b⁴，a³+b⁶，a⁴﹣b⁸，…，请观察它们的构成规律，用你发现的规律写出第10个多项式为____．

上一题下一题 0.0难度选择题更新时间:2018-05-05 09:48:30

答案(点此获取答案解析）

a¹⁰﹣b²⁰

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钢铁在潮湿的空气中会被腐蚀，会发生的原电池反应。以下说法正确的是( )

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如图，梯形ABCD中，AD∥BC，DC⊥BC，AD=2，BC=6，若以AB为直径的⊙O与CD相切于点E，则DE等于（　　）

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如图为渗透作用实验，开始时如图1，A代表清水，B，C代表蔗糖溶液，过一段时间后结果如图2，漏斗管内液面不再变化，H₁、H₂表示漏斗管内液面与清水的液面高度差．下列说法错误的是（）

同类题4

A

Tom is an eight-year-old student in Grade three. He is not interested in his lessons. He spends most of his time playing basketball. At night, he doesn't sleep until very late in order to play. In the morning, he usually gets up late and hurries to school. Sometimes he sleeps in class.

Tom's father is worried about his poor schoolwork. He tried to make him work harder. One day, his father said to him, "My boy, if you get one hundred marks in the exam, I'll buy a new basketball for you." The boy was very happy to hear that.

The next day Tom came running home. "Oh, Dad, I got one hundred." He shouted, "I got forty in English this morning and sixty in Chinese this afternoon!"

根据短文内容判断正误。

同类题5

该吃午饭了，咱们去餐厅吧。(完成句子)

____ ____ ____ lunch. Let's go to the dining hall.

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