在研究电流跟电压，电阻的关系实验中，某同学得到下列两个表的实_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题实验题

在研究电流跟电压，电阻的关系实验中，某同学得到下列两个表的实验数据。

（1）表一中还有些数据漏填，请补填完整。

（2）分析表一中的数据可得出结论：

在Ｒ一定时，。

（3）分析表二中的数据可得出结论：

在Ｕ一定时，。

答案

（1）0.1 3 10 0.16 （2）流过导体的电流与导体两端的电压成正比（3）流过导体的电流与导体的电阻成反比

题目分析：电压一定时，流过导体的电流与导体的电阻成反比；电阻一定时，流过导体的电流与导体两端的电压成正比.根据欧姆定律公式：I=及变形公式U=IR可以解题.所以表一中的数据为：0.1和3，表二中的数据为：10和0.16.

完形填空

缺词填空

Louis Braille, a Frenchman, couldn’t see anything when he was three years old. At the age of ten, he went to a special school for b小题1:children. The teacher there taught him a new w小题2:of reading by touching raised letters(字母) on the paper. H小题3:, it was slow way to read, and it did not help the blind write. In 1819, a French soldier invented a special writing c小题4:“night writing”. Night writing used twelve dots(小圆点). In 1824, Braille knew about the night writing and b小题5:to change it for the blind to use. He didn’t use 12 dots but s 小题6: dots. Letters are made with one or more dots. In this way, Braille was a 小题7:to use the six dots for all twenty-six letters. Now people call this writing the “Braille Writing” and people first used it in 1829. F 小题8: then on, many blind people from all over the world used it. Before this writing a 小题9:, the blind could not read or write. Many of them lived in hospitals and knew n 小题10:about the world outside. His work helped them see the world through their fingers.

单项选择题 A1/A2型题

直立姿势时，不能借助于重力引流的鼻旁窦是（）

A.额窦

B.蝶窦

C.上颌窦

D.筛窦前组

E.筛窦后组