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【简答题】
求函数y=x 2 -x+3的图象的对称轴、顶点坐标及与x轴的交点坐标．
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】不是所有的新能源汽车的高压组件壳体上都带有一个标识,售后服务人员或每位车主均可通过标识直观看出高压可能带来的危险,所用警示牌基于国际标准危险电压警告标识。
A.
正确
B.
错误
【单选题】The author followed the blind man because _________.
A.
he was sure the blind man would jump off the tower
B.
he was curious and wanted to find out what the blind man was up to
C.
he had a lot of time and nothing else to do
D.
he believed the blind man would need help to get to the top of the tower
【简答题】___It’s getting late, I’m afraid I must go now. — Ok. _______. A.Take it easy B Go slowly C. Stay longer D. See you
【单选题】I must go now. ______, if you want that book I'll bring it next time.
A.
Incidentally
B.
Accidentally
C.
Occasionally
D.
Subsequently
【简答题】P N 结两端加正向电压时,即P区接电源_ ____________ 极 。
【单选题】I must go now. ______, if you want that book I'll bring it next time.
A.
incidentally
B.
accidentally
C.
occasionally
D.
subsequently
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