题目

课文填空某些空需填两个单词 The kite 1) ________ high in the sky, but nothing happened. I was beginning to think that the experiment would not 2)________. Just then, I saw some of the hairs on the string 3)___________. The string was getting 4)________. I brought my finger close to the key and felt a light but very clear 5)_______________.The experiment proves that 6)____________ and electricity are the same. I had travelled only two hours one day 7)______ the winds increased so much that I had to put my tent up 8)_______ the winds became too strong. Within a few minutes the winds 20．$\frac{b}{a}$+$\frac{c}{a}$=$\frac{b+c}{a}$（a≠0）．√．    （判断对错）