The public is not allowed within a 2-mile________of the missile site.
A:limit
B:limitation
C:area
D:border
选词填空。
Sit to Good are Point
已知A={x|x2≥9},B={x|﹣1<x≤7},C={x||x﹣2|<4}.
(1)求A∩B及A∪C;
(2)若U=R,求A∩∁U(B∩C).