皮皮学，免费搜题
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搜题
【单选题】
影响寄生虫病流行的因素不包括A.
环境因素
B.
生物因素
C.
自然因素
D.
社会因素
E.
人为因素
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
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【单选题】听力原文：W: All right, that comes to $20.75. Do you have one of our store membership cards? M: What is that? W: It's a free card which allows our customers to receive special discounts. You simply need to...
A.
Apply immediately with any credit card.
B.
Fill out the membership application form.
C.
Pay a membership fee.
D.
Buy certain items in the store.