单项选择题

The infection and incidence season of Babesia canis is basically the same as the activity season of the vector tick.

A.正确
B.错误
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Most of Babesia canis are double pear-shaped in red blood cells.
A.正确
B.错误
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Dogs with heartworm infection are often accompanied by nodular skin diseases.
A.正确
B.错误
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