【单选题】触电急救必须分秒必争,立即就地迅速用( )进行急救。
【单选题】设A={(x,y)|y=-4x+6},B={(x,y)|y=5x-3},则A∩B=( )
【简答题】设A={(x,y)|3x+y=1},B={(x,y)|y=(1-2k 2 )x+5},若A∩B=φ,则k=______.
【简答题】触电急救必须分秒必争。立即就地迅速用()进行急救。 (A)人工呼吸法 (B)心肺复苏法 (C)胸外按压法 (D)医疗器械
【单选题】触电急救必须分秒必争,立即就地迅速用( )进行急救。
【单选题】设 a =( x 1 , y 1 ) , b =( x 2 , y 2 ) ,若 | a |=2 , | b |=3 , a ? b =-6 ,则 x 1 + y 1 x 2 + y 2 =( )
【单选题】Why did the writer finally decide to buy three skirts?
A.
The skirts were cheap and pretty.
B.
She liked the patterns on the skirts.
C.
She wanted to do something as compensation.
D.
She was fed up with further bargainning with the woman.