为什么在逆牵引背斜上常形成大油气田？

一个容积为2.5L的塑料瓶，用它装煤油，最多能装______千克．（煤油的密度是0.8×10³Kg/m³）

晕轮效应是指，人们总是从一件事或对人的某一部分成见而影响对整个人的看法。（）

预计通货膨胀率提高时，无风险利率会随之提高，进而导致资本市场线向上平移。风险厌恶感的加强，会提高资本市场线的斜率。 ( )

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 the 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 Knickerbocker Baseball Club of New York City. The rules Cartwright set up for his nine-player team were widely adopted by other clubs and formed the basis of modern baseball. The game was played on a "diamond" infield with the bases 90 feet apart. The first team to score 21 runs was declared the winner. By 1858 the National Association of Baseball Players was formed with 25 amateur teams. The Cincinnati Red Stockings began to pay players in 1869.

Who first gave baseball a standard set of rules

A．Abner Doubleday.

B．Alexander Cartwright.

C．Albert Spalding.

D．Babe Ruth.

国 * * 障法律实施的重要手段和强制措施是（）。

A.追究责任

B.依法制裁

C.法律制裁

D.违法行为

E.惩罚