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问题 单项选择题

患者，男，40岁。腹痛黏液便2周，下痢稀薄，带有白冻，且滑脱不禁，食少神疲，肢冷，舌淡，苔薄白，脉沉细。粪便细菌培养检出痢疾杆菌。其证型是

A．寒湿痢

B．虚寒痢

C．阴虚痢

D．湿热痢

E．休息痢

答案

参考答案：B

多项选择题

外圆磨削阶梯轴时产生台阶端面圆周跳动误差的原因是：（）。

A、吃刀过大，退刀过快；

B、切削液浇注不充分；

C、工件顶得过紧或过松；

D、砂轮主轴有轴向窜动；

E、头架主轴轴承间隙过大；

F、用卡盘夹装夹磨削端面时头架主轴轴向窜动过大；
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填空题



Most taxpayers have had enough income tax collected by their employers during the year. So they do not (36) any money. In fact, most Americans get some money back. Last year, the Internal Revenue Service returned at least some money to more than (37) Americans paying individual income tax.
The United States has what is called (38) . Tax rates increase as (39) increase. This year, people earning more than (40) are taxed at the highest rate.
Earnings above that amount are taxed at (41) . Earnings below that amount are taxed at lower rates.
Individuals who earn less than (42) pay no income tax. But they do pay (43) , Medicare and other taxes.
There are many different ways for people and businesses to reduce their (44) Most homeowners, for example, can reduce their taxes a little by reporting to the I.R.S. the interest they pay (45) . This is called a (46)
In 2004, personal income taxes provided the government with most of its money: (47) of the budget. Social security and other (48) taxes provided (49) . Other forms of income include (50) , money borrowed to (51) and special taxes on (52) .
But income from taxes did not provide enough to pay for government spending. The I.R.S. says the budget deficit for 2004 was about (53) dollars.
Preparing tax documents can be complex. The I.R.S. estimates that taxpayers need an average of about 13 hours to prepare tax documents. And that is just for the basic tax form. For business, the I.R.S. estimates an (54) needs more than 50 hours. This is why a lot of Americans pay (55) to complete their tax documents for them.
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