【单选题】--Are you often on vacation? -- Not always.
【单选题】That could be enough to ______Greenspan to relax.
【简答题】Sleep, rest and (relax) ______ are the best remedies for many headaches.
【单选题】影响老年人睡眠的因素不包括:
H.
为老年人选择用药时要保证用药的受益大于风险,遵循的用药原则是:
J.
五种药物原则 K. 小剂量原则 L. 择时原则
【判断题】氯氟烃类化合物排入大气中可造成臭氧层破坏
【单选题】People are really ______________ on the beach in summer (夏季).