答案：领导权问题。
A. Smith＇s sisters
B. Smith sisters
C. Two Smith sisters
D. The Smith sisters
解析：解析:表示一家人,前面加 the
解析：解析:本题考查的知识点为直线的方程和直线与直线的关系.由于两条直线平行的充分必要条件为它们的方向向量平行,因此可取所求直线的方向向量为(2,1,-1).由直线的点向式方程可知所求直线方程为
A. 矛盾的主要方面与次要方面的关系问题
B. 主要矛盾与次要矛盾的关系问题
C. 矛盾的同~性和斗争性的关系问题
D. 矛盾的普遍性和特殊性的关系问题
A. It turned up
B. It turned out
C. It turned on
D. It turned over
解析：解析:turn up: 露面, 来到 We arranged to meet at the cinema at 7: 30, but he failed to turn up.解析:turn out: turn out to be sb./sth.; turn out that…证明是某人(某物),原来是┄┄解析:She turned out to be a friend of my sister./ It turned out that she was a friend of my sister.解析:turn on 开灯解析:turn (sb./sth.) over: 翻身或翻转解析:She turned over and went to sleep.她转过身就睡着了。
A. for learning
B. for learning how
C. how to learn it
D. to learn how
A. which
B. it
C. that
D. this
