题目内容

大豆胞囊线虫是以、和在土壤中越冬，是一种定居型内寄生线虫以2龄幼虫在土中活动寻找根尖侵入。

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大豆胞囊线虫雄成虫为，雌虫为。

PH值高的土壤中大豆胞囊线虫胞囊数量远低于PH低的土壤。

A. 对
B. 错

What is the relationship between the two speakers?

A. Teacher and student.
B. Students in the same school.
C. Brother and sister.

What are the speakers going to do next?

A. Wait for their families.
B. Go to the airport.
C. Go to the graduation ceremony.