已知∠AOB=2∠AOC,那么OC是不是∠AOB的角平分线?请画图表示。
解:不一定是角平分线,如下图:
根据课文内容填写恰当的单词
Since the 1970s many new 小题1:.________ have been found for me. I have become very important in communication, 小题2:.________ and trade. I have also been put into robots and used to make mobile phones as well as help with 小题3:.________ operations. I have even been put into space rockets and sent to 小题4:._______ the Moon and Mars. Anyhow, my 小题5:.________ is to provide humans with a life of high 小题6:.________.
To be 小题7:._______, a lot of people 小题8:._______ great importance to becoming rich and 小题9:.________. But just how do people 小题10:.________ a band?
古希腊神话中雅典的守护神是()。