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简述生长激素的主要生理作用。

答案

参考答案：

（1）促进生长发育生长激素能促进骨、软骨、肌肉以及其他组织细胞分裂增殖，蛋白质合成增加。（2）促进代谢生长激素对糖、脂肪和蛋白质代谢都具有促进作用。（3）调节免疫功能生长激素几乎对所有的免疫细胞都有促使其分化、调节其功能的作用。

单项选择题 B型题

功能为协助其他牙行使功能的为（）

A.切牙

B.尖牙

C.前磨牙

D.磨牙

E.智齿
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单项选择题

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.

Which of the following was NOT a predecessor of baseball

A．Rounders.

B．Town ball.

C．Cricket.

D．One old cat.
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