试题与答案

SQL语言成为关系数据库的国际标准的年份是 A.1986年 B.1987年 C.19

题型:单项选择题

题目:

SQL语言成为关系数据库的国际标准的年份是

A.1986年

B.1987年

C.1998年

D.1989年

答案:

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下面是错误答案,用来干扰机器的。

①碳酸氢钠受热分解,试管内壁有小水珠生成 ②干燥剂(或者吸收水蒸汽)③2Na2O2+2CO2=2Na2CO3+O2 ④澄清石灰水变浑浊 CO2+Ca(OH)2=H2O+CaCO3↓ ⑤氧气题目分析:①碳酸氢钠不稳定,受热易分解,生...

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Horse thieves, cattle rustlers, bank robbers, train and stagecoach robbers, highwaymen, murderers, these were but some of the criminals who infested the American frontier during the 19th century. In English legend Robin Hood can be considered a bandit, but the outlaws of the Old West were far more violent men and women without any scruples when it came to taking property or life.
The careers of many outlaws have been glamorized through fictional accounts of their deeds and their exploits have been the basis for many movie scripts.
The era of the American outlaw lasted about 100 years roughly from 1800 to 1900.There had been lawlessness during the Colonial Era. Frontiers have always attracted misfits, failures and renegades who hope to profit by being beyond the reach of government. In the years just before the Revolutionary War, gangs of horse thieves in the back country of South Carolina were broken up by organized bands of farmers called regulators.
As frontier settlement expanded rapidly after the Revolution, more opportunities for criminals opened, two common types of bandits were highwaymen and river pirates. Highwaymen accosted people who traveled on foot or horseback, while river pirates preyed upon the boat traffic on the Ohio, Mississippi, and other rivers. Some bandits engaged in both.
Criminals in the West gathered momentum with the gold rushes to California, Idaho, Montana, Nevada, and other states. Stagecoaches and trains carrying gold and money became prime targets for bands of outlaws. Bank robberies emerged after the California Gold Rush of 1849 and as prosperity found its way to frontier towns. The first stage robbery was recorded in 1851, and the first train robbery happened in 1866.
After the Civil War there was the growth of the cattle kingdom in Texas and neighboring states. Cattle rustling and horse theft turned into significant operations. Range wars bred a great amount of violence. Cattlemen fought over land and water rights, and they fought with great bitterness against sheep farmers. In Texas, range wars were fought over the use of barbed wire to fence grazing land.
By the end of the 19th century, the frontier era was past. Major crime shifted to the cities. Ethnic gangs had existed in the slums for decades, preying mostly on their fellow immigrants. With the arrival of Prohibition in the 1920s, an impetus was given to the formation of organized crime as it exists today.

According to Paragraphs 5 and 6, which of the following is INCORRECT
[A] The gold rushes brought about more opportunities for crimes.
[B] Banks gained their prosperity in frontier towns after 1849.
[C] After the Civil War, thieves turned to steal cattle and horses.
[D] In Texas, cattlemen had to fight for the access to land and water.

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