f(6)=2×6-4=8=22.
故答案为:22.
—____ will he go back to school?
—In a week.[ ]
A. How
B. How long
C. How soon
D. How often
一位70岁的男性因渐进性劳累后呼吸困难6个月来到诊室。他有高血压病史,正服用氢氯噻嗪。体格检查他的脉搏是80次/分。进一步体格检查时最有可能发现()
A.重搏脉
B.低幅度脉/脉弱
C.交替脉
D.奇脉
E.脉差增大