题目内容：
哪种寄生虫卵可作为评价土壤清洁程度的指标
参考答案：
答案解析：
单选题：哪种寄生虫卵可作为评价土壤清洁程度的指标
- 题目分类：公卫助理医师
- 题目类型：单选题
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通货紧缩的危害有（ ）。
通货紧缩的危害有（ ）。
在直线回归分析中，得到回归系数为一0．30，经检验有统计学意义，说明
在直线回归分析中，得到回归系数为一0．30，经检验有统计学意义，说明
According to the passage, which of the following best descri
According to the passage, which of the following best describes the sequence of
It can be inferred from the passage that the sun____________
It can be inferred from the passage that the sun_______________.
He didn't buy the book because he was interested in poetry.
He didn't buy the book because he was interested in poetry.