主动脉粥样硬化最主要的后果是()
A.休克
B.主动脉瘤
C.高血压
D.肠梗阻
E.脑栓塞
参考答案:B
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
溴化锂吸收式剂制冷机短期停机保养,需要检修要避免机内()。
A.进入氮气
B.进入氧气
C.进入氢气
D.长时间暴露于大气以防止腐蚀