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26.So many natural disasters are believed    over the recent years because of the frequent unreasonable mankind activities.

    A.to have come about           B.to come about

    C.coming about                 D.to be coming about

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25.---How does the girl we met just now strike you?

  ---She is   but beautiful.

    A.anything      B.anybody      C.everything    D.everybody

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24.The whole team were wild with joy when their captain    top in the race.

    A.came up      B.came out     C.turned up     D.went out

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23.---It is said we may have got the result of the exam by the end of next month, won’t we?

  ---Sure.     .You’ll be informed in time.

    A.With pleasure  B.No wonder    C.It doesn’t matter    D.Take your time

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22.---Was your holiday trip to Europe amazing?

  ---Not really! But      we got back safe, before the European airspace restriction caused by the Icelandic volcano ashes.

    A.narrowly      B.successfully    C.smoothly      D.thankfully

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第一节:单项填空(共15小题,每小题1分,满分15分)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

21.     Haitian man, according to his family, has survived four weeks under ruins since

     destructive earthquake this January.

    A.The; a         B.The;/          C.A;/           D.A; the

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23.(本小题满分10分)

将一枚硬币连续抛掷次,每次抛掷互不影响. 记正面向上的次数为奇数的概率为,正面向上的次数为偶数的概率为.

(Ⅰ)若该硬币均匀,试求

(Ⅱ)若该硬币有暇疵,且每次正面向上的概率为,试比较的大小.

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22.(本小题满分10分)

已知动圆过点且与直线相切.

(Ⅰ)求点的轨迹的方程;

(Ⅱ)过点作一条直线交轨迹两点,轨迹两点处的切线相交于点为线段的中点,求证:轴.

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