The parasitic site of Sarcoptes scabiei on sheep is（）

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• The lifecycles of Sarcoptes and Psoroptes include （）
• None of the four pairs of legs for Sarcoptes scabiei exceed the external margin of the body.
• Adult mites of Psoroptes is smaller than adult mites of Sarcoptes.
• The life cycle of Sarcoptes mites includes the pupae.
• Compared to Sarcoptes mites，Psoroptes mites are more common found in goats.