多项选择题

品牌延伸的强度受以下几个因素的影响：（） A. 品牌的定位强度 B. 品类相关性 C. 竞争强度 D. 品牌背后企业的技术深度

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单项选择题

China has joined the multilateral group controlling the export of nuclear materials and technology in an important step to bring its policies on proliferation in line with those of Western powers. 以下断句更为恰当的是（） A. China has joined the multilateral group controlling the export of nuclear materials and technology // in an important step to bring its policies on proliferation in line with those of Western powers. B. China has joined the multilateral group controlling the export of nuclear materials and technology in an important step// to bring its policies on proliferation in line with those of Western powers.

其他条件不变时，只把球轴承上的基本额定动载荷增加1倍，则该轴承的基本额定寿命是原来的[_]倍。

答案： 8