设{an}是等差数列,且a1+a5=6,则a3等于( )
A.1
B.2
C.3
D.4
∵数列{an}为等差数列
∴2a3=a1+a5=6,
∴a3=3
故选C
脉搏短绌的听诊特点是()
A.心律完全不规则
B.心音强弱不等
C.脉率少于心率
D.心率快慢不一
E.心肌收缩力强弱不等
The girl with her grandparents for the moment because her parents are both very busy this month.
A.lived
B.is living
C.live
D.was living