Final answer:
The distrust toward new medical technology in Hemingway's "In Another Country" is shown through a major's sarcastic question about playing football again, his doubt when examining a photograph of a treated hand, and his dismissive comment about the doctor's explanation.
Step-by-step explanation:
In the excerpt from Ernest Hemingway's "In Another Country," the sentences that demonstrate the soldiers' distrust toward new technology and medicine in the postwar era are:
"He winked at me when the doctor examined his hand, which was between two leather straps that bounced up and down and flapped the stiff fingers, and said: 'And will I too play football, captain-doctor?'
"The major held the photograph with his good hand and looked at it very carefully. 'A wound?' he asked.
'Very interesting, very interesting,' the major said, and handed it back to the doctor.
The major's sarcasm when asking if he will play football again, his questioning of the before and after hand photograph, and his dismissive 'very interesting' remark all hint at a skepticism of the medical technology being presented to them.