题目内容
The butterfly ________ its wings and moved them slowly up and down.
- A.spread
- B.shut
- C.opened
- D.separated
展开双臂或张开翅膀用动词spread。
学而优衔接教材南京大学出版社系列答案
小学课堂作业系列答案By the mid-nineteenth century, the term "icebox" had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities. Ice was used in hotels, taverns(酒馆), and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861-1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880, half of the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families for their own use. This had become possible because a new household convenience, the icebox, a precursor (前身) of the modern fridge, had been invented.
Making an efficient icebox as not as easy as we might now suppose. In the early nineteenth century, the knowledge of the physics of heat, which was essential to a science of refrigeration, was rudimentary(未发展的). The commonsense notion that the best icebox was one that prevented the ice from melting was of course mistaken, for it was the melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping up the ice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenth century did inventors achieve the delicate balance of insulation(绝缘) and circulation needed for an efficient icebox.
But as early as 1803, and ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he used an icebox of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium price(高价) for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his icebox, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool.
【小题1】Where was ice used after the Civil War?
| A．In refrigerating freight cars and households. |
| B．In hotels, taverns and hospitals |
| C．In families of New York, Philadelphia, and Baltimore. |
| D．In fresh meat, fish and butter by city dealers. |
| A．Keeping the ice from melting |
| B．Knowledge of the physics of heat. |
| C．Balance of insulation and circulation |
| D．Making efforts to reduce the use of ice |
| A．the deveopment of icebox |
| B．the theoretical foundation of icebox |
| C．the wrong ideas about icebox |
| D．the way of using icebox |
| A．Thomas Moore is the inventor of modern fridge |
| B．The butter produced by Thomas Moored is better in quality than other famers’ |
| C．Knowledge of the physics of heat plays an important part in inventing a good icebox |
| D．Before 1880, most of the sold ice was used for family use. |
| A．to sell their produce at high price |
| B．to go home earlier |
| C．to keep their produce fresh |
| D．to win more customers than their competitors |
When I was growing up, I always gave my mom an apron （围裙）on her birthday．I wanted my own mom — 21 that apron I'd just given her, of course —to 22 me at the end of each afternoon bearing a plate of home-baked 23 as she waited breathlessly to hear about my 24 day at school．
Mom loved her family without question, but as an elementary-school teacher she had her own exciting days to 25 .She had hardly any extra time and 26 , and home-baked treats were rare in our house except 27 very special occasions．Since Mom didn't make cookies very often, the 28 of her baking were not always the same．Sometimes the cookies were browned a little more than planned or 29 together and other times the cookies weren't smooth． 30 , none of that bothered anyone in the family．All we 31 was swallowing whatever we were having for dinner that night so we could get to the cookies 32 us on the kitchen counter．
Now that I'm a mom myself, I can 33 all too well why my mother didn't always have the time to wear the apron．As was true with my mother, the list of things I need to do is often 34 than the day itself．But I also understand the desire to 35 the same yellow mixing bowl my mother used and make something special for my family every so often．Whatever I bake is met with approval, appreciation and good 36 by my husband and children．At some level, I believe they're 37 that I was thinking about them as I 38 the brown sugar into the butter or frosted the cake with their favorite kind of icing．They always know I love them．I 39 they know it a little better when I'm in a baking mood．
I'm sure my mother felt 40 the same way whenever she made cookies for us．Those cookies will always, in my mind, be the best treat．
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