A radioallergosorbent test is a blood test using radioimmunoassay test to detect specific IgE antibodies, to determine the substances a subject is allergic to. This is different from a skin allergy test, which determines allergy by the reaction of a person's skin to different substances.
Nicephore Niepce created the first photograph.
The answer is B.
Late at night, some traffic signals change patterns and become flashing yellow or red lights.
