利用PubMed的基本检索查找有关hypertension近3年的文献，正确的检索式是（）
A: hypertension AND “last 3 year”[dp]
B: hypertension AND “last 3 year”[ti]
C: hypertension AND “last 3year”[au]
D: hypertension AND “last 3 year”[pt]
A: hypertension AND “last 3 year”[dp]
B: hypertension AND “last 3 year”[ti]
C: hypertension AND “last 3year”[au]
D: hypertension AND “last 3 year”[pt]
举一反三
- 在PubMed检索高血压饮食治疗的文献，下面哪个检索式比较好？ A: Hypertension/diet therapy B: Hypertension AND diet therapy C: Hypertension AND "diet therapy" D: Hypertension OR diet therapy
- She hasn't written to me ______. A: for last year B: during last year C: since last year D: until a year ago
- Alpha methyldopa is primarily used for: A: Pregnancy induced hypertension B: Renovascular hypertension C: First line agent in hypertension D: Refractory hypertension
- The factory has turned out ______. A: twice TV sets this year more than last year B: TV sets this year twice as many as last year C: twice as many TV sets this year as last year D: TV sets twice more this year that last year
- The factory has turned out ___. A: TV sets twice more this year than last year B: twice more TV sets this year than last year C: twice as many TV sets this year as last year D: TV sets this year twice as many as last year