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【单选题】
掺伪或中毒样品采样应注意:A.
代表性
B.
典型性
C.
普遍性
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】记名股票的特点不包括（ ）。
【单选题】听力原文：M: How do you feel about flying? W: I don't mind flying. What I don't like is not being able to keep an eye on my luggage. Whenever the man at the airport hakes my luggage, I never expect to see ...
A.
The likelihood of losing her luggage.
B.
The possibility of taking a wrong flight.
C.
The difficulty in communicating with others.
D.
The unfriendliness of the porter at the airport.