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【单选题】
下列关于二次函数的说法错误的是 [     ]
A.
抛物线y=-2x 2 +3x+1的对称轴是直线x=
B.
抛物线y=x 2 -2x-3,点A(3,0)不在它的图象上
C.
二次函数y=(x+2) 2 -2的顶点坐标是(-2,-2)
D.
函数y=2x 2 +4x-3的图象的最低点在(-1,-5)
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参考答案:
举一反三
【单选题】检查蛲虫病首先方法是
A.
粪便直接涂片法
B.
粪便饱和盐水浮聚法
C.
肛门拭子法
D.
粪便直接找成虫法
E.
粪便自然沉淀法
【判断题】在拍摄珍贵的文物时,应该避免使用闪光灯。
A.
正确
B.
错误
【单选题】Those who achieve greatness do so not only because of thegiftsthey were given or the talents they developed, but because they had passion for the adventure that inspired their lives. (Para. 2)Which of...
A.
This is an absolute gift at that price.
B.
The husband gave his wife a necklace as an anniversary gift .
C.
She is endowed with the gift of drawing by nature.
D.
None of the above
【单选题】在拍摄珍贵的文物时,应该避免使用( )。
A.
三脚架
B.
快门遥控器
C.
长焦镜头
D.
闪光灯
【单选题】普通心肌细胞动作电位 I期(去级化)形成的机理是
A.
Na + 内流
B.
Ca 2+ 内流
C.
Ca 2+ 内流=K + 外流
D.
K + 外流
【单选题】使用Word中的“矩形”或“椭圆”绘图工具按钮绘制正方形或圆形时,应在拖曳鼠标的同时按____键。
A.
Tab
B.
Alt
C.
Shift
D.
Ctrl
【单选题】They were given only ___________ training in the job.
A.
esoteric
B.
rudimentary
C.
striking
D.
preponderant
【单选题】Choose the one in which the underlined part is closest in meaning to that of the sentence taken from the text.Those who achieve greatness do so not only because of the gifts they were given or the tal...
A.
This is an absolute gift at that price.
B.
The husband gave his wife a necklace as an anniversary gift.
C.
She is endowed with the gift of drawing by nature.
D.
null
【单选题】检查蛲虫病首先方法是
A.
粪便直接涂片法
B.
粪便饱和盐水浮聚法
C.
肛门拭子法
D.
粪便直接找成虫法
E.
以上都不是
【单选题】下列哪种疾病不是由原生动物引起的?
A.
疟疾
B.
黑热病
C.
橡皮肿
D.
昏睡病
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