题目内容
如图所示，三个圆的半径均为a，三个圆两两相交于圆心，则图中阴影部分的面积为()．
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随同产品出售不单独计价的包装物，应该在包装物发出时，结转成本并计入其他业务成本中。
下面①—⑥各表述了极光产生的一个物理过程，选出其发展顺序排列正确的一项()。
①被激活的地球附近的电子碰到极地大气层的原子上。
②太阳磁场磁力线与地磁场磁力线接合。
③一部分磁场带着俘获的粒子和巨大的能量反弹回地球。
④太阳风试图将地磁场带走。
⑤地球背风面磁力线的变化继而断开。
⑥一部分地磁场顺流冲去，直趋场外行星。
现代企业制度的基本形式是()。
In order to communicate thoughts and feelings, there must be a conventional system of signs or symbols which mean the same to the sender and the receiver.
The means of receiving communications are too numerous and varied for systematic classification; therefore, the analysis must begin with the means of receiving communication. Reception of communication is achieved by our senses. Sight, heating, and touch play the most important roles.
Example of visual communication are gesture and mini-cry. Although both frequently accompany speech, there are systems that rely solely on sight, such as those used by deaf and dumb persons. Another means of communicating visually is by signals of fire, smoke, flags or flashing lights. Feeling may be simply communicated by touch, such as handshaking , although a highly developed system of handshaking has enabled blind, deaf, and dumb persons to communicate intelligently. Whistling to someone, applauding in a theater, and other forms of communication by sound rely upon the ear as a receiver. The most fully developed form. of auditory communication is, of course, the spoken language.
The means of communication mentioned so far have two feature in common; they last only a short time, and the persons involved must be relatively close to each other. Therefore all are restricted in time and space.
The author explains that he will deal with reception of communication first because ______.
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