设α1，α2，α3，α4都是3维向量，则必有()
B
暂无解析
Managers set _____and decide how their company can achieve them.
买方信贷是指()
若随机变量 X～B（4，1/3），则 P{ X≥1} ＝ _________.
The shipment time is June or July at our _____ and the goods will be shipped in one_____.
《洛美协定》规定欧盟对参加协定的发展中国家所提供的进口关税是()
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