影响斜纹线倾角的因素有()、()。
参考答案:经纬密度;飞数
在数位顺序表中,从个位起第五位是______位,第八位是______位,它们都属于______级,第十位是______位,属于______级.
He was riding to school _____ he saw the accident this morning. [ ]
A. when
B. while
C. as
D. so