题目内容
人类脑电波中的。波通常在以下何时出现
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It has been justly said that while" we speak with our vocal organs we (1) with our whole bodies." All of us communicate with one another (2) , as well as with words. Sometimes we know what we’re doing, as with the use of gestures such as the thumbs-up sign to indicate that, we (3) . But most of the time we’re not aware that we’re doing it. We gesture with eyebrows or a hand, meet someone else’s eyes and (4) . These actions we (5) are random and incidental. But researchers (6) that there is a system of them almost as consistent and comprehensible as language, and they conclude that there is a whole (7) of body language, (8) the way we move, the gestures we employ, the posture we adopt, the facial expression we (9) , the extent to which we touch and the distance we stand (10) each other.The body language serves a variety of purposes. Firstly it can replace verbal communication, (11) with the use of gesture. Secondly it can modify verbal communication, loudness and (12) of voice is an example here. Thirdly it regulates social interaction: turn taking is largely governed by non-verbal (13) . Finally it conveys our emotions and attitudes. This is (14) important for successful cross-culture communication.Every culture has its own" body language", and children absorb its nuances (15) with spoken language. The way an Englishmen crosses his legs is (16) like the way a mate American does it. When we communicate with people from other, cultures, the body language sometimes help make the communication easy and (17) , such as shaking hand is such a (18) gesture that people all over the world know that it is a signal for greeting. But sometimes--the body language can cause certain misunderstanding (19) people of different cultures often have different forms behavior for sending the same message or have different (20) towards the same body signals. Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C, and D on ANSWER SHEET 1.13（）
设根结点的层次为O，则高度为k的完全二叉树的最小结点数为 ______。
Armstrong公理系统的3条推理规则是自反律、增广律和 ______。
下列病毒感染中属于慢病毒感染的是
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