(20 13? Before giving the patient an injection, the nurse disinfected the syringe with alcohol cotton balls to make the patient feel cool here.

(1) Alcohol evaporates easily. When it evaporates, it will absorb heat, so the skin wiped with alcohol cotton balls will feel cool.

(2) Figures A and C show that the glass bulb of the thermometer touches the bottom of the container, and the use method of the thermometer is incorrect; Figure B shows that the glass bulb of the thermometer hits the container wall, and the thermometer is used incorrectly; Figure d shows that the glass bulb of the thermometer is completely immersed in the liquid to be measured, but it does not touch the bottom of the container, and the wall of the container touches the bottom of the container. Use it correctly.

Therefore, the answer is: vaporization absorbs heat; D.