单项选择题

What time will Mr. White be picked up?
A、6:00 tomorrow morning
B、6:00 tomorrow evening
C、6:00 tonight

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单项选择题
In a decision-making process, a participatory leader（ ）A. allows each team member to have a say and to participate in team processes.B. tends to make all team decisions and controls all resources.C. may ultimately decide the team's actions, but seldom takes into consideration the team members' experience, knowledge, and preference's.
多项选择题
给定数据集，现在要使用PCA和最近邻方法来构建一个分类器。输入训练图像样本，为了从PCA算法获得合理的性能，这些图像需要的预处理步骤是？ A、将所有图像缩放或裁剪为相同的大小。 B、将分类目标对准图像中相同的位置。
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