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执行以下程序段后，变量c$的值是【7】。 a$="北京" b$="Shanghai" c$="Left(a$,2)+String(3,"—")+Right(b$,8)

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Many of you are studing English and you may be (41) why it is so difficult to learn. It’s actually not too difficult to learn (42) you know some (43) about the language and culture that it reflects (反映)。 Perhaps the first thing you need to know about English is that it is made up of several other languages (44) French, German, Latin, Greek and Angle Saxon. In addition (此外), there are words (45) Spanish and many American Indian words and names, even some Chinese and Japanese (46) can be found in the English language. This borrowing of words (47) other languages is (48) of the key reasons (49) some of the difficulties that people meet with (50) they are learning English.

A. [A] while [B] before [C] after

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 of the modern fridge, had bean invented. Making an efficient icebox was 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 coarse 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 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 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. Where was ice used after the Civil War

Work can bring us happiness. Write an essay on the topic of Work and Happiness. The first sentence is given and you’re required to develop it into a full composition. Your part of writing should be 160-200 words. You should write it on ANSWER SHEET 2. Work and Happiness Happiness is dependent upon work. ___________________________________

以下程序判断从文本框Text1中输入的数据，如果该数据满足条件：除以3余2，除以 5余3，除以7余4，则输出；否则，将焦点定位在文本框Text中，选中其中的文本。 Private Sub Command1_Click() x＝Val(Text1.Text) If 【9】 Then Print x Else Text1.SetFoeus Text1.SetStart＝0 End If End Sub