题干

已知点A(a﹣2b,2﹣4ab)在抛物线y=x2+4x+10上,则点A关于抛物线对称轴的对称点坐标为(   )

A:(﹣3,7)

B:(﹣1,7)

C:(﹣4,10)

D:(0,10)

上一题 下一题 0.0难度 选择题 更新时间:2018-04-19 02:25:54

答案(点此获取答案解析)

D

同类题3

 When we think of Christmas, we probably think of 1  , Christmas trees and Santa Claus. But behind all these things lies the true meaning of Christmas: the importance of sharing and giving love and joy to people around us. The story in A Christmas Carol is perhaps the best example of this.

 A Christmas Carol is a famous short novel written by British writer Charles Dickens (1812-1870). It is about an old man 2 Scrooge who never laughs or smiles. He only thinks about himself and is3 to share things with others. He doesn’t treat others nicely. He just cares about whether he can 4and he hates Christmas. One Christmas Eve, Scrooge sees the ghost of Jacob Marley, his dead business partner. Marley used to be just like Scrooge, so he was 5  after he died. He warns Scrooge to change his ways if he doesn't want to end up like him. He also tells Scrooge to expect  6  ghosts to visit him.

 That  7 , the ghosts visit Scrooge. First, the Ghost of Christmas Past takes him back to his childhood and reminds him  8  his happy days as a child. Then the second ghost, the Ghost of Christmas Present, takes him to see  9  others are spending Christmas this year. Everyone is happy, even poor people. The last one, the Ghost of Christmas Yet to Come, takes him to the  10 . Scrooge sees that he is dead, but nobody cares. He is so  11 that he wakes up in his bed and finds out it is only the next morning — Christmas Day!

 Scrooge decides to change his life and   12 to be a kind person. He  13  celebrates Christmas with his relatives. He also gives gifts to people in need. He now treats   14  with kindness and warmth, spreading love and joy everywhere he goes. And that is the true   15 of Christmas!

同类题4

阅读下面的文字,完成小题。

       吴育,字春卿,建安人也。父待问。累官光禄卿,以礼部侍郎致仕。育少奇颖博学,举进士,试礼部第一,中甲科。除大理评事,迁寺丞。历知临安、诸暨、襄城三县。

       庆历五年,拜右谏议大夫、枢密副使。居数月,改参知政事。山东盗起,帝遣中使按视,还奏:“盗不足虑。兖州杜衍、郓州富弼,山东人尊爱之,此可忧也。”帝欲徙二人于淮南。育曰:“盗无足虑者,小人乘时以倾大臣,祸几不可御矣。”事遂寝。向绶知永静军,为不法,疑通判江中立发其阴事,因构以危法中之,中立自经死。绶宰相子,大臣有营助,欲傅轻法。育曰:“不杀绶,无以示天下。”卒减死一等,流南方。

       育在政府,遇事敢言,与宰相贾昌朝数争议上前,左右皆失色。育论辨不,乃请曰:“臣所辨者,职也;顾力不胜,愿罢臣职。”乃复以为枢密副使。帝语大臣曰:“吴育刚正可用,第嫉恶太过耳。”一日,侍读禁中,帝因语及“臣下毁誉,多出爱憎,卿所当慎也” 。育曰:“知而形之言,不若察而行之事。圣主之行,如日月之明。进一人,使人皆知其善,出一人,使人皆晓其恶,则阴邪不能构害,公正可以自立,百王之要道也。”

       育性明果,所至作条教,简疏易行而不可犯。遇事不妄发,发即人不能挠。辨论明白,使人听之不疑。初尹开封,范仲淹在政府,因事与仲淹忤。既而仲淹安抚河东,有奏请,多为任事者所沮,育取可行者行之。

(节选自《宋史》列传第五十,有删改)

      【注】①致仕:在官任上退休。②除:授予官职。③中:陷害。④忤:违逆,不顺从,不和睦。