There has been much speculation about the origin of baseball. In 1907 a special commission decided that the modern game was invented by Abner Doubleday in 1839. One hundred years later the National Baseball Museum was opened to honor Doubleday. Historians, however, disagree about the origin of baseball. Some say that baseball comes from bat-and-ball games of ancient times. It is a matter of record that in the 1700s English boys played a game they called "baseball". Americans have played a kind of baseball since about 1800. At first tile American game had different rules and different names in various parts of the country — "town ball". "rounders", or "one old cat". Youngsters today still play some of these simplified forms of the game.
Baseball did not receive a standard set of rules until 1845, when Alexander Cartwright organized the Knicker-bocker Baseball Club of New York City. The rules Cartwright set up for his nine-playe
A. exercise
B. leisure
C. profit
D. socializing
| The climate of earth has fluctuated
quite a bit over the last 4.6 billion years of our planers history and it can be
expected that the climate will continue to change. One of the most intriguing
questions in earth science is whether the periods of ice ages are over or are we
living in an "interglacial" period of time between ice ages The geologic time period we are now living in is known as the Holocene(全新世). This epoch began about 11,000 years ago which was the end of the last glacial period and the end of the Pleistocene (更新世) epoch. The Pleistocene was an epoch of cool glacial and warmer interglacial periods which began about 1.8 million years ago. Since the glacial period known as the "Wisconsin" in North America and "Wrm" in Europe when over 10 million square miles (about 27 million km2) of North America, A. ended about 11,000 years ago B. is an existing geologic time period C. is the beginning of the Pleistocene epoch D. is an epoch of cool glacial and warmer interglacial periods [单项选择]对被保险人因疾病需做手术而发生的医疗费用提供专门保障的健康保险被称为______。
A. 综合医疗保险 B. 普通医疗保险 C. 特种医疗保险 D. 手术医疗保险 [判断题]1876年在上海修建的唐胥铁路是中国领土上出现的第一条铁路,该铁路从上海至吴淞镇,全长14.5km。
A.正确 B.错误 [单项选择]高度为120m的建筑，宜采用______的供水方式。
A. 垂直分区并联 B. 垂直分区串联 C. 垂直串联 D. 分区减压 [判断题]部分停电的工作，小于表3-1规定距离以内的未停电设备，应装设临时遮栏，临时遮栏可用坚韧铁质材料制成，装设应牢固，并悬挂“止步，高压危险！”标示牌。
A.正确 B.错误 我来回答: 提交
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