如图,在平面直角坐标系中,抛物线与x轴交于点A(,0)、B(4,0)两点,与y轴交于点C. (1)求抛物线的表达式; (2)点P从A点出发,在线段AB上以每
单项选择。从 A、B、C、D 四个选项中选出可以填在空白处的最佳答案 I am reading _______ story. It is ________ interesting story. A. the; the B.
-- Why were you absent yesterday? --- I caught a cold, I had been walking around in the rain. A.but B.so C.and D.for
关于人体内环境中pH调节叙述不正确的是 ( ) A.人体血液的pH通常在7~7.53之间 B.血液中乳酸过多时,就与NaHCO3发生反应,生成乳酸钠和H2CO3 C.
下图为“以极点为中心的半球示意图,箭头为地球自转方向。读图回答1-3题。 1.图中a位于( ) A.亚洲大陆 B.非洲大陆 C.太平洋
用0、1、2、3、4、5组成没有重复数字的四位数,其中能被6整除的有 A.72个 B.60个 C.52个 D.48个
Mexico City is truly one of the most amazing cities in the world with a mixture of both the old and new world. From the moment your plane starts to land in this vast city, you know that your trip w
单项选择 Who can tell me the answer _____ this question? A. on B. to C. for