【单选题】将预算管理嵌入企业经营管理活动的各个领域、层次、环节是遵循了( )原则。
【简答题】已知 i , j 分别是与x轴,y轴正方向相同的单位向量, OB 1 = ai - 6j (a∈R),对任意n, B n B n+1 = 6i +3? 2 n-1 j . (1)若 OB 1 ⊥ B 2 B 3 ,求a的值; (2)求向量 OB n .
【单选题】What did he do to make her happy.
A.
He studied much harder.
B.
He often took her for a tide.
C.
He alwaysendured her insults.
D.
He often bought her presents and meals.
【单选题】What did he do to make her happy? 查看材料
A.
He studied much harder.
B.
He often took her for a ride.
C.
He always endured her insults,
D.
He often bought her presents and meals.
【单选题】将预算管理嵌入企业经营管理活动的各个领域、层次、环节是遵循了( )原则。
【单选题】已知 i 、 j 分别是与x轴、y轴方向相同的单位向量,且 AC =-3 i +6 j , BC =-6 i +4 j , BD =- i -6 j ,则一定共线的三点是( )