【简答题】已知:向量 e 1 , e 2 不共线. (1) AB = e 1 - e 2 , BC =2 e 1 -8 e 2 , CD =3 e 1 +3 e 2 . 求证:A,B,D共线. (2)若向量 λ e 1 - e 2 与 e 1 -λ e 2 共线,求实数λ的值.
【简答题】思想是() A、 是中国集 体智慧 的 结晶, 以 命名,就是充分肯定的卓越贡献。 B、 个人的思想
【单选题】假币一般分为______________两大类
【单选题】Jealousy typically refers to the thoughts, feelings, and behaviors that occur when a person believes a valued relationship is being threatened by a rival. This rival may have no knowledge of threateni...
A.
a feeling of resentment towards one who threatens a relationship
B.
a relationship threatened by an aggressive rival
C.
a feeling or behavior. regardless of one's age, gender or appearance
D.
an imagination of a potential rival
【单选题】如果 e 1 与 e 2 是两个单位向量,下面有五个命题(1) e 1 = e 2 (2) | e 1 | = | e 2 | (3) e 1 ? e 2 =1 (4) e 1 2 = e 2 2 (5) e 1 ∥ e 2 ,则 e 1 = e 2 .其中不正确的是…( )
【单选题】The members of the club wouldn't run a ____ entrusting(委托) the organization to an unreliable person.
【判断题】名字作为符号其中之一是为了区别是此人与彼人
【单选题】Most people find the topics taught in family finance useful for they ___ to the personal life.