题目

When several different people look at the same person, it is not unusual for each of them to see different things; when you alone observe one behavior or one person at two different times, you may see different things. The following are but some of the factors that lead to these varying perceptions（感知，感觉）: k+s-5#u  Each person’s perceptions of others are formed by his or her own cultural conditioning, education, and personal experience. Sometimes perceptions differ because of what we choose to observe and how we deal with what we’ve observed. It is not necessarily true that设集合A={x|-4＜x＜3}，B={x|x≤2}，则A∩B=A.（-4，3）B.（-4，2]C.（-∞，2]D.（-∞，3）