观察如图所示的长方体后填空: (1)用符号表示下列两棱的位置关系: A 1 它 1 ______A它,A 1 A______A它,A 1 D 1 ______C 1 D 1 ,AD______它C; (2)A 1 它 1 与它C所在的直线是两条不相交的直线,d们______平行线(填“是”或“不是”),由此可知,在______内,两条不相交的直线才能叫做平行线.
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【简答题】听下面段材料, 回答第1至3题. 1. Who is Charles? A. Cindy's husband. B. Cindy's son. C. Cindy's grandson. 2. How many grandsons does Cindy have? A. One. B. Two. C. Three. 3. How does Cindy's daughter get along wit...