题目内容
下列选项中，能作为坐标系统的是（）
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若确定起点后，终点在起点的X轴正方向100的位置，则可以输入坐标（），确定终点。
坐标的输入方法有多种，点的坐标可以分为直角坐标和_________坐标。其中，直角坐标又分为_________和_________两种。_________坐标是以原点为基点定位，_________坐标在数值前面加@。
I think they’re becoming much more demanding. I think people are 1 a lot more for their money nowadays and I think the way the world is now, people are more open and more 2of what they’re receiving for their money. So, I think we have seen a 3in the number of people who would complain, when perhaps they wouldn’t have complained before – which is no bad thing because it gives us great 4.
下列因素未确定与高血压发病有关的是
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