37×(45-23)÷310,
=37×(1215-1015)×103,
=37×215×103,
=421.
点P(2a-6,5-a)在第一象限内,则a的取值范围是
[ ]
A、3<a<5
B、a>3
C、a<5
D、3≤a≤5
Williams shows some challenging means ________ diners at their mystery lunch on Sunday might eat the special dish.
A.after which
B.in which
C.by which
D.for which