【单选题】以下膜分离过程中不是以压力作为分离过程推动力的是:
【简答题】已知两个椭圆的方程分别是 C 1 :x 2 +9y 2 -45=0, C 2 :x 2 +9y 2 -6x-27=0、 (1)求这两个椭圆的中心、焦点的坐标; (2)求经过这两个椭圆的交点且与直线x-2y+11=0相切的圆的方程.
【单选题】护理人员严格参照操作规范程序手册进行工作,属于评判性思维的:(可参看教材的221页)
【单选题】根据以下材料,回答题 About Turkey Some of the concerns surrounding Turkey's application to join the European Union, to be voted on by the EU's Council of Ministers on December 17th, are economic—— in particular...
A.
Its GDP per head is far lagging behind that of the EU members.
B.
Its inflation rate is still rising.
C.
Its economy grows faster than any EU member.
D.
Its economic resilience is very strong.
【简答题】(1)求与椭圆4x 2 +9y 2 =36 有相同的焦点,且过点(0,3)的椭圆方程. (2)已知椭圆的对称轴为坐标轴,离心率e= 2 3 ,长轴长为12,求椭圆的方程.
【单选题】P是椭圆 x 2 4 + y 2 3 =1 上横坐标为1的点,以椭圆右焦点为圆心,过点P的圆方程是( )
【单选题】护理人员严格参照操作规范程序手册进行工作,属于评判性思维的 ( )
【单选题】以下膜分离过程中不是以压力作为分离过程推动力的是: