持续低热，暮热早凉，形瘦，手足蠕动，舌绛无苔，脉细数。此证属于A．血分虚热 B．血分

建设工期不足1年的，到位资金原则上不得少于工程合同价的( )。

A．20%
B．30%
C．40%
D．50%

A公司为增值税一般纳税人，增值税税率为17%，该公司采用应收账款余额百分比法核算坏账损失，坏账准备的提取比率为5%。2006年12月31日应收账款余额为260万元。2007年1月有关资料如下： (1)1月8日向B公司销售商品5000件，每件250元，单位销售成本160元，月末未收到该笔货款； (2)1月20日因产品质量原因，B公司要求退回．2005年2月5日购买的80件商品，销售单价250元，单位成本160元。该批商品货款A公司尚未收到，A公司同意B公司退货，并办理退货手续和开具红字增值税专用发票，A公司收到B公司退回的商品； (3)1月25日C公司宣布破产，致使A公司发生坏账损失20万元； (4)1月28日A公司收回前期已确认的坏账15万元，存入银行； (5)1月31日A公司计提坏账准备。 要求： 根据上述资料，编制有关业务的会计分录(答案金额单位用万元表示)。

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 is true about the origins of baseball

A．Historians agree that baseball was invented by Abner Doubleday.

B．Baseball, as played in the early 19th century, differed very little from today’s game.

C．As early as the 1700s, English boys played a game called "baseball".

D．The first standard set of baseball rules was established at the turn of the century.

正在获得飞行经历的初始新乘务员可以担任机组必需成员。

科学研究按研究成果的性质分类通常可划分为（）、应用研究和推广研究。

A.基础研究

B.实验研究

C.技术研究

D.方法研究