A standard unit of measurement based on the distance to the sun is the astronomical unit.
Answer:
B. to be a visual tool for understanding a healthy diet
Explanation:
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Chancre
The first sign of syphilis is a small sore, called a chancre (SHANG-kur). The sore appears at the spot where the bacteria entered your body. While most people infected with syphilis develop only one chancre, some people develop several of them. The chancre usually develops about three weeks after exposure.
The process is known as Metastasis
