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【简答题】
如图，已知点 点C在y轴的正半轴上，且 抛物线 经过 三点，其顶点为 . 求抛物线 的解析式； (1)求抛物线的解析式 (2)试判断直线CM与以AB为直径的圆的位置关 系，并加以证明； (3)在抛物线上是否存在点N，使得 ?如果存在，那么这样的点有几个？如果不存在，请说明理由。
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【单选题】Pupils often want to sit next to their particular friend and many classroom activities involve moving about, but even relatively snail alterations can make ______ to the visual comfort of pupils with ...
A.
a difference
B.
an interference
C.
a modification
D.
an impact
【单选题】They want to sit near the back where the couches are. (改为否定句)
A.
They don't want to sit near the back where the couches are.
B.
They not want to sit near the back where the couches are.
C.
They does not want to sit near the back where the couches are.
【简答题】根据材料，回答下列问题：(14分) 材料一 亚洲某农作物分布图 材料二 美国部分农业地带分布图 材料三 人口变化折线图 (1)甲图中影响①地区农业地域类型发展的主要社会经济条件是________________。（1分） (2)乙图②地区的农业地域类型是________________，而该国五大湖沿岸发展的农业地域类型是_______________，影响该种农业地域类型发展的区位条件是____...
【单选题】Pupils often want to sit next to their particular friend and many classroom activities involve moving about, but even relatively small alterations can make ______ to the visual comfort of pupils with ...
A.
a difference
B.
an interference
C.
a modification
D.
an impact
【单选题】Where does the man want to sit?
A.
Near the band.
B.
By a window.
C.
Near the dance floor.
【单选题】各种材料中不同类型的缺陷要求有不同的渗透时间,一般说来,细的、紧密的裂缝要求
A.
比大而浅的缺陷所需的渗透时间要短;
B.
比大而浅的缺陷所需的渗透时间要长;
C.
与大而浅的缺陷所需的渗透时间相同;
D.
工件被检测前作高度酸侵，可以不论渗透时间的长或短;
【单选题】听力原文：Do you want to sit on the first floor or the second floor? (A) I have extra brochures you can have. (B) I prefer to sit near the stage. (C) I live on the second floor. (28)
A.
B.
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