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【简答题】
如图所示，平面直角坐标系中，抛物线y=ax 2 +bx+c经过A（0，4）、B（-2，0）、C（6，0），过点A作AD∥x轴交抛物线于点D，过点D作DE⊥x轴，垂足为点E，点M是四边形OADE的对角线的交点，点F在y轴负半轴上，且F（0，-2）。 （1）求抛物线的解析式，并直接写出四边形OADE的形状； （2）当点P、Q从C、F两点同时出发，均以每秒1个长度单位的速度沿CB、FA方向运动，点P运动到O时P、Q两点同时停止运，设运动的时间为t秒，在运动过程中，以P、Q、O、M四点为顶点的四边形的面积为S，求出S与t之间的函数关系式，并写出自变量的取值范围； （3）在抛物线上是否存在点N，使以B、C、F、N为顶点的四边形是梯形？若存在，直接写出点N的坐标；不存在，说明理由。
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参考答案：
举一反三
【简答题】Task 2 (10 points) Directions: In this task there is a passage followed by an incomplete outline. You should read the passage carefully and fill in each blank with no more than three words . 阅读文章,然后填空...
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【判断题】在用光学平直仪和精密水平仪测量机床导轨的直线度误差时，可用作图法或计算法求得误差值。( )
A.
正确
B.
错误
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【简答题】Mrs. Peters stopped playing the piano when she began to work. She had lived in a very small flat, and there had been no room for a piano. But when she married, she had a new flat which was big enough ...
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【简答题】A: Do you have a dream job in mind already? If so, what is it? Would you mind sharing it with us? B: My dream job is a 1 position such as a manager leading a team to help the company reach its goals. ...
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【简答题】Choose 10 proper nouns in the following paragraph. My cousin, Anna, is a university student in Chicago. Her major is art history. She is interested in modern art. Her favorite painter is Picasso. He w...
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【简答题】Fill in the blanks in the following sentences with the words given in the box. Change the form where necessary. enthusiastic defensive strategy motivate figure out caut...
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【单选题】企业因债权人撤销而无法支付的应付账款时,应按所转销的应付账款账面余额计入( )。
A.
资本公积
B.
营业外收入
C.
其他应付款
D.
管理费用
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【简答题】在用光学平直仪和精密水平仪测量机床导轨的直线度误差时，可用哪两种方法求出误差？
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【单选题】Refer to the exhibit. What is the sequence of s when a VoIP call is placed from IP phone P1 to IP phone P2？ （）
A.
RTP traffic is exchanged between IP phone P1 and IP phone P2. IP phone P1 alerts the CCM of off-hook state. CCM instructs IP phone P1 to provide dialtone. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2.
B.
CCM instructs IP phone P1 to provide dialtone. IP phone P1 alerts the CCM of off-hook state. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2. RTP traffic is exchanged between IP phone P1 and IP phone P2.
C.
CCM instructs IP phone P1 to provide dialtone.IP phone P1 alerts the CCM of off-hook state. IP phone P1 passes digits to CCM. RTP traffic is exchanged between IP phone P1 and IP phone P2. CCM routes call to PSTN or IP phone P2.
D.
IP phone P1 alerts the CCM of off-hook state. CCM instructs IP phone P1 to provide dialtone. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2. RTP traffic is exchanged between IP phone P1 and IP phone P2.
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【简答题】Fill in the blanks with words or phrases from the box below.Change the form where necessary. Pursuit folk motivation be big on all the way takeover elementary hook predict 1 . I'm a tech fan and _____...
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相关题目：
【简答题】Task 2 (10 points) Directions: In this task there is a passage followed by an incomplete outline. You should read the passage carefully and fill in each blank with no more than three words . 阅读文章,然后填空...
查看完整题目与答案
【判断题】在用光学平直仪和精密水平仪测量机床导轨的直线度误差时，可用作图法或计算法求得误差值。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Mrs. Peters stopped playing the piano when she began to work. She had lived in a very small flat, and there had been no room for a piano. But when she married, she had a new flat which was big enough ...
查看完整题目与答案
【简答题】A: Do you have a dream job in mind already? If so, what is it? Would you mind sharing it with us? B: My dream job is a 1 position such as a manager leading a team to help the company reach its goals. ...
查看完整题目与答案
【简答题】Choose 10 proper nouns in the following paragraph. My cousin, Anna, is a university student in Chicago. Her major is art history. She is interested in modern art. Her favorite painter is Picasso. He w...
查看完整题目与答案
【简答题】Fill in the blanks in the following sentences with the words given in the box. Change the form where necessary. enthusiastic defensive strategy motivate figure out caut...
查看完整题目与答案
【单选题】企业因债权人撤销而无法支付的应付账款时,应按所转销的应付账款账面余额计入( )。
A.
资本公积
B.
营业外收入
C.
其他应付款
D.
管理费用
查看完整题目与答案
【简答题】在用光学平直仪和精密水平仪测量机床导轨的直线度误差时，可用哪两种方法求出误差？
查看完整题目与答案
【单选题】Refer to the exhibit. What is the sequence of s when a VoIP call is placed from IP phone P1 to IP phone P2？ （）
A.
RTP traffic is exchanged between IP phone P1 and IP phone P2. IP phone P1 alerts the CCM of off-hook state. CCM instructs IP phone P1 to provide dialtone. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2.
B.
CCM instructs IP phone P1 to provide dialtone. IP phone P1 alerts the CCM of off-hook state. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2. RTP traffic is exchanged between IP phone P1 and IP phone P2.
C.
CCM instructs IP phone P1 to provide dialtone.IP phone P1 alerts the CCM of off-hook state. IP phone P1 passes digits to CCM. RTP traffic is exchanged between IP phone P1 and IP phone P2. CCM routes call to PSTN or IP phone P2.
D.
IP phone P1 alerts the CCM of off-hook state. CCM instructs IP phone P1 to provide dialtone. IP phone P1 passes digits to CCM. CCM routes call to PSTN or IP phone P2. RTP traffic is exchanged between IP phone P1 and IP phone P2.
查看完整题目与答案
【简答题】Fill in the blanks with words or phrases from the box below.Change the form where necessary. Pursuit folk motivation be big on all the way takeover elementary hook predict 1 . I'm a tech fan and _____...
查看完整题目与答案
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