The earpieces of the stethoscope should be bent forward when they are placed in the ears

Which heat detector uses two metals, one which expands faster than the other when heated, to break a circuit and send a signal to the fire alarm control panel?

A. Bimetallic detector B. Ultraviolet detector C. Fusible link detector D. Continuous line detector

Brain imaging techniques, including both PET scans and fMRIs, are aiding in the comprehension of mental disorders such as ________.

Fill in the blank(s) with the appropriate word(s).