问题
问答题
图中的AB和CD是长度相同的两根镍铬合金线.用图示的装置可以探究导体电阻的大小跟______的关系.
答案
由图可知,两根镍铬合金线,材料相同,长度相同,只有横截面积不同;
故答案为:横截面积.
图中的AB和CD是长度相同的两根镍铬合金线.用图示的装置可以探究导体电阻的大小跟______的关系.
由图可知,两根镍铬合金线,材料相同,长度相同,只有横截面积不同;
故答案为:横截面积.
用方框内适当的词填空(有三个多余选项)。 | |
3 some flowers in the room(客厅). They arevery nice. There _4 some books on the dress-er. Kate often(经常) does her homework in theroom. Kate's father and mother are 5 . Hermother teaches Chinese and her father teachesEnglish. Kate has a brother. 6 name isMike. He's only 7 years old. Kate 7 Mikevery much. |