患者男性，42岁。右颊部基底细胞癌1年，手术切除癌灶，遗留一3.5cmX2.5cm圆

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.

科技档案鉴定工作包括对科技档案的（）和质量鉴别两方面。

A、档源鉴定

B、价值鉴定

C、数据鉴定

D、途径鉴定

Ⅰ、下列曲线分别表示元素的某种性质与核电荷数的关系（Z为核电荷数，Y为元素的有关性质）；

把与下面的元素有关性质相符的曲线的标号填入相应括号中：

（1）ⅡA族元素的价电子数______   （2）第三周期元素的最高化合价______

（3）IA族碱金属元素单质熔点______

（4）第三周期离子Na⁺、Mg²⁺、Al³⁺、P^3-、S^2-、Cl^-的离子半径______

（5）第二、三周期元素随原子序数递增原子半径的变化______

Ⅱ、在①¹²₆C  ②³⁹₁₉K  ③⁴⁰₂₀Ca  ④¹³₆C    ⑤¹⁴₇N   ⑥⁴⁰₁₈Ar中：（用序号填空）

（1）互为同位素的是______和______；

（2）质量数相等，但不能互称同位素的是______和______；

（3）中子数相等，但质子数不相等的是______和______，______和______．

航信通目前只提供（）公司（包括港澳台）的实时航班查询。

雨天和雪天进行高处作业时，必须采取可靠的防滑、防寒和（）措施。

A.防霜

B.防水

C.防雾

D.防冻