① 3-4+6-7      ② 18-6÷(-2)×()
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科目:初中數(shù)學(xué) 來源: 題型:

(12分)
如圖,AB是⊙O的直徑,弦DE垂直平分半徑OA,C為垂足,弦DF與半徑OB相交于點P,連結(jié)EF、EO,若

⑴求⊙O的半徑;
⑵求圖中陰影部分的面積

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科目:初中數(shù)學(xué) 來源: 題型:

(8分)供電局某工程隊在冬天架設(shè)電線,如圖所示,設(shè)兩電線桿間距離為L,銅導(dǎo)線總質(zhì)量為M,電線架好后,在兩桿正中部位電線下墜的距離為h,電線在桿上固定處的切線方向與豎直方向的夾角為θ,求:

(1)兩電線桿處的電線彈力.
(2)當(dāng)?shù)较奶鞎r,兩電線桿處的電線彈力與冬天相比是變大了,還是變小了?為什么?(提示:導(dǎo)線上每處的彈力均沿切線方向)

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科目:初中數(shù)學(xué) 來源: 題型:閱讀理解


Welcome to Chatsworth
Opening Time
House 11:00 a.m. Last admission (允許進入) 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:初中數(shù)學(xué) 來源: 題型:

一個銳角的補角比它的余角大         

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科目:初中數(shù)學(xué) 來源: 題型:

德國法學(xué)家耶林認為:“羅馬曾三次征服了世界,第一次是武力,第二次是宗教,第三次則是以法律!惫糯_馬之所以能以法律征服世界,是因為羅馬法中流傳后世的原則是
A.法律面前人人平等,公正至上B.以眼還眼,以牙還牙
C.禮不下庶人,刑不上大夫D.婦女不得參加任何事務(wù)

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科目:初中數(shù)學(xué) 來源: 題型:

近似數(shù)2.8萬精確到____________位,將525701保留兩個有效數(shù)字得____________

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百位數(shù)字是a,十位數(shù)字是b,個位數(shù)字是c的三位數(shù)是
A.a(chǎn)bcB.a(chǎn)+b+cC.100a+10b+cD.100c+10b+a

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科目:初中數(shù)學(xué) 來源: 題型:

圖中∠BOD的度數(shù)是(    )
A.55°B.110°C.125°D.150

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