若2a+3b=4,则9a-27b的值为______.
9a•27b=32a•33b=32a+3b,
∵2a+3b=4,
∴9a•27b=34=81.
故答案为:81.
通货紧缩的基本标志是()。
A.国民收入持续下降
B.物价总水平持续下降
C.货币供应量持续下降
D.经济增长率持续下降
The physician orders a tricyclic antidepressant for a client who has suffered an acute myocardial infarction (MI) within the past 6 months. The nurse should take which of the following actions
A.Administer the medication as ordered.
B.Discontinue the medication.
C.Question the order with the physician.
D.Inform the client that he should discuss the MI with the physician.