人工激发的地震波,在地面引起振动位移非常微小,只有10-10m的量级,来至浅层和深层

题型:判断题

问题:

人工激发的地震波,在地面引起振动位移非常微小,只有10-10m的量级,来至浅层和深层的地震波能量无差异。

考点:石油地震勘探工石油地震勘探工中级石油地震勘探工中级题库
题型:判断题

急性胰腺炎时,下列哪种体位可减轻腹痛()。

A.截石位

B.胸膝位

C.弯腰抱膝位

D.仰卧位

E.俯卧位

题型:判断题

矫治前必须有记录患者牙情况的模型,称之为()。

A.记存模型

B.石膏模型

C.上颌模型

D.初模型

E.终模型

题型:判断题

用户使用需求

题型:判断题

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 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-player team were widely adopted by other clubs and formed the basis of modem 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.

What was the first professional baseball team called

A.New York Knickerbockers.

B.Milwaukee Braves.

C.Cincinnati Red Stockings.

D.Brooklyn Dodgers.

题型:判断题

决定出血时间长短的因素为()

A.因子Ⅷ和Ⅻ减少 

B.血小板数量和功能异常 

C.因子Ⅴ和Ⅱ减少 

D.因子Ⅴ和Ⅻ减少 

E.因子Ⅴ和Ⅶ减少

更多题库