【单选题】According to the author, when a doctor tells a patient to 'return next Wednesday', the doctor is in fact
A.
instructing the patient to buy more medical services.
B.
warning the patient that a hospital stay might be necessary.
C.
advising the patient to seek a second opinion.
D.
admitting that the initial visit was ineffective.
【单选题】According to the author, when a doctor tells a patient to 'return next Wednesday', the doctor is in effect ______.
A.
advising the patient to seek a second opinion
B.
admitting that the initial visit was ineffective
C.
instructing the patient to buy more medical services
D.
warning the patient that a hospital stay might be necessary
【单选题】理想气体经历了下列过程,其体积膨胀了三倍,其中有一个过程的熵变与其他三个不同,它是( )