题目

根据句子结构的语法性，在下面空格处填入一个适当的词或使用括号中词的适当形式填空，并将答案填入答题卡的相应位置。 26. _____ hasn’t been decided whether we will go to Beijing by plane. 27. You can’t leave the school without your teacher’s ________(permit). 28. Lucy is 160 cm tall and Mary is ________ (slight) taller than her. 29. He worked very hard, that’s _______ he succeeded. 30. He _______ (lie)on the bed reading when his mother came in . 31. It is     unbelievable thing that such an excellent football team should have fa关于电场线的说法中正确的是（   ）A．电场中任何两条电场线都不可能相交B．电场中每一点的场强方向跟电荷在该点所受电场力方向相同C．电场线越密的地方同一试探电荷所受电场力越大　D．沿电场线的方向场强越来越小