《后汉书》载：“大秦国……在海西，亦云海西国。地方数千里，有四百余城。小国隶属者

不等式4－3x≥2x－6的非负整数解有

A．1 个

B．2 个

C．3个

D．4个

功能失调性子宫出血是指 （）

A.生育期妇女子宫异常出血

B.青春期妇女的异常出血

C.生殖器官无器质性病变的异常子宫出血

D.绝经后妇女的异常出血

E.人流术后妇女的异常出血

By the mid-nineteenth century, the “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, 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 the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families of their own use. This had become possible because a new household convenience, the icebox, a precursors of modern refrigerator, had been invented.

Making an efficient icebox was not as easy as we might now suppose. In the early nineteenth century, the knowledge of physics of heat, which was essential to a science of refrigeration, was rudimentary. The commonsense notion that the best icebox was one that prevented the ice from melting was of course mistaken, for it was melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping 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 and circulation needed for an efficient icebox.

But as early as 1803, an 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(奖金) price 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:What does the passage mainly discuss?

A．The influence of ice on the diet.

B．The development of refrigeration.

C．The transportation of goods to market.

D．Sources of ice in the nineteenth century.小题2:According to the passage, when did the word “icebox” become part of the language of the United States?

A．in 1803

B．sometime bore 1850

C．during the civil war

D．near the end of the nineteenth century.小题3:The phrase “forward-looking” in line 3 is closest in meaning to______.

A．progressive

B．popular

C．thrifty

D．well-established小题4:The author mentions “fish” in the passage because _____.

A．many fish dealers also sold ice.

B．fish was shipped in refrigerated freight cars.

C．fish dealers were among the early commercial users of ice

D．fish was not part of the ordinary person’s diet before the invention of the icebox.

某农场与某糖厂于1月份签订了一份购销50吨当年产的甘蔗合同，约定每吨甘蔗1万元，共计价款50万元。合同签订后，由于春雨连绵，积涝成灾，致使农场几百余亩甘蔗基本绝产。为不影响糖厂的正常生产加工，农场以不可抗力导致甘蔗绝产为由，立即向糖厂提出解除购销合同的书面通知。糖厂接到农场书面通知后，不同意解除合同，遂向人民法院提起诉讼，要求农场继续履行购销合同。
问：(1)农场能否单方面解除合同
(2)此案应如何处理

我国于1987年1月用于取代全国统一书号的是（）