皮皮学，免费搜题
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【单选题】
在电子商务中，至关重要的核心问题是A.
明确消费者偏好
B.
价格
C.
成本
D.
安全性
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Match each paragraph with its main idea.
【单选题】Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.
A.
how
B.
what
C.
where
D.
that
【简答题】A．One hundred years ago. B．Two hundred years ago. C．Hundreds of years ago. D．Thousands of years ago.
【简答题】Read the passage. Match each paragraph with the information it contains.
【单选题】China's history is more than 5 _________ years old. [ ]
A.
thousands of
B.
thousand of
C.
thousands
D.
thousand
【简答题】Read the Passage. Match each paragraph with the information it contains.
【简答题】Read the passage and match each paragraph with the corresponding aspect.
【简答题】Match each paragraph with the corresponding measure it describes to clean the lathe.
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