【简答题】The teacher said, “The baby was born in 2010.” → The teacher said the baby _____ in 2010.
【简答题】The teacher said, “ The earth goes round the sun. ” The teacher said that the earth ( )round the sun.
【简答题】已知集合A={x|x 2 ﹣3x﹣10≤0},B={x|m+1≤x≤2m﹣1},且B≠ . (1)若“命题p: x∈B,x∈A”是真命题,求m的取值范围; (2)“命题q: x∈A,x∈B”是真命题,求m的取值范围.
【简答题】电路的主要作用是:首先能实现电能的( )、( )和( ),其次是实现信号的( )、( )。
【简答题】已知集合A={x|x 2 -2ax+a 2 -1<0}, B={x| x+1 ax-2 >1} ,命题P:2∈A,命题Q:1∈B,若复合命题“P或Q”为真命题,“P且Q”为假命题,求实数a的取值范围.
【简答题】(本小题满分12分) 已知集合A={x|log2(x-1)<1},集合B={x|x2-ax+b<0,a,b∈R}. (1)若A=B,求a,b的值; (2)若b=3,且A∪B=A,求a的取值范围.
【简答题】(本小题13分) 已知集合A={x|a≤x≤a+3},B={x|x5}. (1) 若 ; (2) 若A∪B=B,求a的取值范围.