On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy’s car got on this trip must have been between ？（）

A.A

B.B

C.C

D.D

E.E

目前临床上常用的降压药物包括

A．神经节阻断药

B．钙拮抗剂

C．利尿降压药

D．血管紧张素转化酶抑制剂

E．肾上腺素受体阻断药