真菌、细菌、病毒都是病原菌。
参考答案：错
如图分别表示正点电荷和负点电荷的电场线的分布情况，在“○”填入“+”或“-”
They arrived at the hotel near the sea ________ a snowy evening. [ ]
A. on
B. at
C. in
D. for
