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1.-5的绝对值为A.-5 B.5 C.-1/5D.1/5点评本题考查绝对值的概念,属于数学基础知识的范畴,突出对基础概念的考查.2.在一个不透明的布袋中装有3个白球和5个红球,它们除颜色不同外,其余均相同.从中随机摸出一个球,摸到红球的概率是A.1/5B.1/3C.3/8D.5/8点评通过对简单的实际问题的设置,考查学生运用概率知识解决问题的能力.3.下列四张正方形硬纸片,剪去阴影部分后,如果沿虚线折叠,可以围成一个封闭的长方体包装盒的是
The absolute value of 1.-5 is A.-5 B.5 C.-1 / 5D.1 / 5 comments This question examines the concept of absolute value, belonging to the category of basic knowledge of mathematics, highlighting the basic concepts of the test.2 In An opaque bag contains three white balls and five red balls, all of which are the same except for their color. A ball is randomly picked and the probability of touching a red ball is A.1 / 5B.1 / 3C. 3 / 8D.5 / 8 Review Through the simple set of practical problems, students use the probability of knowledge to solve the problem of the ability to test the following three square pieces of cardboard, cut off the shaded part, if folded along the dotted line, you can Wai The box into a closed box is