-I called you last night, but there was no answer. -Oh, I’m sorry. I dinner at my friend’s home. A. had B. have had C. was having D. am having 查看更多

 

题目列表(包括答案和解析)

30、多选题:
A quadrilateral that can be inscribed in a circle is also called a cyclic quadrilateral.Which of these quadrilaterals are always cyclic
BDE

A.parallelograms kites     B.isosceles trapezoids         C.rhombuses                
D.rectangles               E.squares.
圆内接四边形又称为联圆四边形,下列是联圆四边形的有
BDE

A.平行四边形;B.等腰梯形;C.菱形;D.矩形;E.正方形.

查看答案和解析>>

The symbol(符号) 5!is called five factorial(阶乘)and means 5×4×3×2×1;Thus(因而)5!=120.How many 6!=?What is the result of 
(n-1)!
n!
?Do you know 6!=
 
; 
(n-1)!
n!
=
 
?.

查看答案和解析>>

Jiuzhaigou is a very beautiful place. It is in the Aba Tibetan and Qiang Autonomous Region in Sichuan Province. Jiuzhaigou is a valley. It is more than 40 kilometers long. The green and golden trees, the lofty and multi-shaped mountains and the clear and colorful waters form the unique beauty of Jiuzhaogou. The water of Jiuzhaigou is the soul of the beauty. There are more than 100 lakes of different shapes in the valley. These lakes have wonderful colors. They are called “haizi”, which means son of the sea. It is these beautiful lakes that make Jiuzhaigou a fantastic place. Between the forests and the lakes, there are nine Tibetan villages. The name Jiuzhaigou means Nine Village Valley.
Jiuzhaigou was discovered because of a panda rescue program. The pandas were once endangered because the bamboo there was blooming. When people came to rescue the pandas, they were surprised by the beauty of Jiuzhaigou. After that, Jiuzhaigou became a protected scenic area.
In China, there is a saying which goes like this: No mountain is worth seeing after you have seen Mount Huang and no other body of water will attract you after you have visited Jiuzhaigou. The beauty of Jiuzhaigou cannot be described with mere words. The best way to enjoy this fairyland is to go there. See you in Jiuzhaigou.
【小题1】 What is the best title for the passage? (no more than 3 words)
_____________________________________________________________
【小题2】 How long is the Jiuzhaigou Valley? (no more than 7 words)
_____________________________________________________________
【小题3】 How was the Jiuzhaigou Valley discovered? (no more than 9 words)
【小题4】 What does the name Jiuzhaigou mean? (no more than 7 words)
_____________________________________________________________

查看答案和解析>>

Dr Asim Syed, 32, has performed more than 100 operations at London’s Hammersmith Hospital in the country’s busiest transplant unit, but never imagined that he would one day become a donor himself.
He stepped forward when was told his 64-year-old mother might be dead within months unless she got a new kidney (肾). The worried surgeon brought her to London to be cared for at his hospital. However, it was not all plain sailing. Tests showed Dr Syed was the wrong blood group, so the only way was to go through a special blood-washing process. He consulted colleagues about that, but they didn’t agree, because the risk of rejection is still too high. Dr Syed and his mother were then advised to consider a new way of donating and receiving, called an organ-paired. That is, Dr Syed donated his kidney to an unknown person and another donor in the chain was a successful match for his mother. The chain of three transplants took place at the same time on July 31 with Dr Syed’s kidney going to a recipient in the Midlands and Mrs. Syed receiving her kidney from a person in the south of England.
Just hours after donating his own kidney, Dr Syed found himself recovering in bed next to his mother. Mrs Syed said, “When I came round from my operation Asim was in the next bed and the first thing he said was, ‘Mum now all your worries are over.’ Tears fell down.”
Now mother and son are recovering well with Dr Syed already back at work. Mrs. Syed is staying with him for several months while the hospital monitors her progress.
He said, “I did what anyone would do when they see a relative suffering disease. Although I wasn’t able to help mum directly, by agreeing to be part of a chain, I was also very happy.”
【小题1】 Why isn’t it a plain sailing?
A.No one can treat his mother well.
B.Dr Syed was the wrong blood group.
C.They didn’t have money to be in hospital.
D.Mrs. Syed was unwilling to receive the operation.
【小题2】Why didn’t his colleagues agree to the method of blood-washing?
A.It is very dangerous.B.It costs too much.
C.They didn’t know how to do it at all. D.They didn’t have the relative equipment.
【小题3】 What can we learn about Mrs. Syed?
A.She was touched by his son’s deed.
B.She has already recovered completely.
C.After operation, she went her own home.
D.She was in hospital in London for many years.
【小题4】What can be inferred from the text?
A.The hospital still needs improving.
B.Dr Syed has love and devotion to his parents.
C.The expense in the hospital is too high to afford.
D.Dr Syed donated his kidney to his mother directly.

查看答案和解析>>

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。
A. Goods for auction (拍卖) sales
  B. Definition of bidding
  C. Way to sell more goods by auction
  D. Auction sales in history
  E. Brief introduction to auctions
  F. Making a larger profit as an auctioneer
【小题1】______
Auctions are public sales of goods, conducted by an officially approved auctioneer. He asks the crowd assembled in the auction-room to make offers, or “bids”, for the various items on sale. He encourages buyers to bid higher figures, and finally names the highest bidder as the buyer of the goods. This is called “knocking down” the goods, for the bidding ends when the auctioneer strikes a small hammer on a table at which he stands.
【小题2】 ______
The ancient Roman probably invented sales by auction, and the English word comes from the Latin auction, meaning “increasing”. The Romans usually sold in this way the goods taken in war. In England in the eighteenth centuries, goods were often sold “by the candle”: a short candle was lit by the auctioneer, and bids could be made while it stayed alight.
【小题3】 ______
Practically all goods whose qualities vary are sold by auction. Among these are coffee, skins, wool, tea, furs, silk and wines. Auction sales are also usual for land and property, furniture, pictures, rare books, old china and similar works of art.
【小题4】 ______
An auction is usually advertised beforehand with full particulars of the articles to be sold and where and when they can be viewed by potential buyers. If the advertisement cannot give full details, catalogues are printed, and each group of goods to be sold together, called a “lot”, is usually given a number. The auctioneer need not begin with Lot 1 and continue in the order of numbers: he may wait until he notices the fact that certain buyers are in the room and then produce the lots they are likely to be interested in.
【小题5】 ______
The auctioneer’s services are paid for in the form of a percentage of the price the goods are sold for. The auctioneer therefore has a direct interest in pushing up the bidding as high as possible. He will not waste time by starting the bidding too low. He will also play on the opponents among his buyers and succeed in getting a high price by encouraging two business competitors to bid against each other.

查看答案和解析>>


同步练习册答案