单项选择题

Ascaris suum is a soil-transmitted parasite.

A.正确
B.错误
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单项选择题
Porcine coccidiosis caused by Isospora suis mainly occurs in piglets ranged from one to three months.
A.正确
B.错误
单项选择题
An oocyst of Isospora suis contains 2 sporocysts, each containing 4 sporozoites.
A.正确
B.错误
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