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① 3-4+6-7      ② 18-6÷(-2)×()
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科目:初中数学 来源: 题型:

(12分)
如图,AB是⊙O的直径,弦DE垂直平分半径OA,C为垂足,弦DF与半径OB相交于点P,连结EF、EO,若

⑴求⊙O的半径;
⑵求图中阴影部分的面积

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科目:初中数学 来源: 题型:

(8分)供电局某工程队在冬天架设电线,如图所示,设两电线杆间距离为L,铜导线总质量为M,电线架好后,在两杆正中部位电线下坠的距离为h,电线在杆上固定处的切线方向与竖直方向的夹角为θ,求:

(1)两电线杆处的电线弹力.
(2)当到夏天时,两电线杆处的电线弹力与冬天相比是变大了,还是变小了?为什么?(提示:导线上每处的弹力均沿切线方向)

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科目:初中数学 来源: 题型:阅读理解


Welcome to Chatsworth
Opening Time
House 11:00 a.m. Last admission (允许进入) 4:30, closes 5:30 p.m. Last entry to Scots Rooms, when open, is 4:00 p.m.
Garden 11:00 a.m. Last admission 5:00, closes 6:00 p.m.
June, July and August Garden opens at 10:30 a.m.
Admission
Adults ………………………………………………………………………£ 6.50
Senior citizens & students ………………………………………………… £ 5.25
Children …………………………………………………………………… £ 3.00
Childrenunderthree …………………………………………………………Free
Family Ticket …………………………………………………………… …£ 16.75
Car Park …………………………………………………………………… £ 1.00
Shopping
Two gift shops, with many times based on designs from the House and Garden.
Christmas shopping available at weekends from November to Christmas
Eating
Restaurant serving home made food. Bar serving drinks and cakes.
Special Events in 2003
Angling Fair weekend
8th and 9th May. One of the only fairs in the Country for game and sea fishing funs.
Flower and garden Show Weekend
26th and 27th June. The second year of this event, with flower shows and sales and gardening advice.
Guided Tours
Guided tours for children and students in English and French at an extra charge. Further details from the Booking office after 10:30 a.m.
63. When is the opening time, during summer?
A. 11:00 a.m.        B. 4:30 p.m.   C. 10:30 a.m.        D. 10:30 p.m.
64. An old person above 60 will pay ______ less than an adult.
A. £1.25         B. £ 2.25          C. £ 5.25         D. £ 6.50
65. How much is a guided tour for children?
A. It’s free     B. £10        C. I don’t know    D. £3
66. What are on sale on 26th and 27th June?
A. Fishes         B. Gardens        C. Fairs          D. Flowers
67. If you want to visit Scots Rooms, when will you get there?
A. At 10:00 a.m.    B. At 5:00 p.m.      C. Before 4:00 p.m.   D. After 6:00 p.m.

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科目:初中数学 来源: 题型:

一个锐角的补角比它的余角大         

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德国法学家耶林认为:“罗马曾三次征服了世界,第一次是武力,第二次是宗教,第三次则是以法律。”古代罗马之所以能以法律征服世界,是因为罗马法中流传后世的原则是
A.法律面前人人平等,公正至上B.以眼还眼,以牙还牙
C.礼不下庶人,刑不上大夫D.妇女不得参加任何事务

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科目:初中数学 来源: 题型:

近似数2.8万精确到____________位,将525701保留两个有效数字得____________

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科目:初中数学 来源: 题型:

百位数字是a,十位数字是b,个位数字是c的三位数是
A.abcB.a+b+cC.100a+10b+cD.100c+10b+a

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科目:初中数学 来源: 题型:

图中∠BOD的度数是(    )
A.55°B.110°C.125°D.150

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