下列税收文件中属于税收法律的是( )。 A．企业所得税法 B．中华人民共和国个人所得

2011年日本发生严重核辐射泄露事故，使得人们开始将目光再次投入到更为安全的太阳能技术上。硅光电池是太阳能电池的一种,某同学为了测定某种硅光电池的电动势和内电阻,设计了如图甲所示电路,图中与A.串联的定值电阻的阻值为R₀,电流表视为理想电表,在一定强度的光照下进行下述实验:

(1)闭合开关,调节滑动变阻器,读出电流表A_l、A₂的值I₁,I₂.为了作出此电池的U-I曲线,需要计算出电路的路端电压U,则U=   (用题中所给字母表示)；

(2)根据测量数据作出该硅光电池的U-I图象如图乙所示,该电池的电动势E=    V,在流过电流表A₂的电流小于200mA的情况下,此电池的内阻r=       Ω；

(3)若将该硅光电池两端接上阻值为6Ω的电阻,此时对应的电池内阻r=     Ω.(计算结果保留两位有效数字)

铣削大质数直齿锥齿轮时，计算偏移量k的经验公式为（）。注：m-圆锥齿轮大端模数b-齿宽r-锥距

A.k=mb/r

B.k=mb/2r

C.k=mr/2b

D.k=2mb/r

在买卖合同中，如果买方不及时提货，卖方可能要对承运人支付滞期费及其他费用，对此应由（）。

A.卖方承担

B.买方承担

C.买卖双方各承担一部分

In June 1985, two British mountaineers Joe Simpson and Simon Yates made the first-ever climb of the 21,000-foot snow-covered Siula Grande mountain in Peru. It was an exceptionally (26) job, but nothing compared to what was to (27) . Early in the process, Simpson (28) and broke his right knee. Yates could have (29) him but managed to find a way of (30) him down the mountains on a rope in a series of difficult drops. Then Simpson fell into a crevasse and Yates eventually had no (31) but to cut the (32) , completely convinced that his friend was now (33)

In his book on the (34) , Joe Simpson wrote:

(35) I looked at the distant moraines, I know that I must at least try I would probably (36) there among those rocks. If I died, well, that wasn’t so (37) , but I wouldn’t have (38) waited for it to happen. The (39) of dying no longer affected me as it had in the crevasse at first. I now had a chance to (40) it and struggle against it.

The survival of Yates himself was (41) . That Simpson somehow found a way of (42) out of the crevasse after 12 hours and then crawled and (43) himself six miles back to camp, (44) three days and might without food or drink, would be considered as a heroic fiction. But in fact it was so (45) .

36().

A. stick out

B. hold out

C. hang out

D. die out

大企业的工资水平通常比较高，主要是因为（）。

A.大企业的生产过程相互依赖程度较高，因而需要对员工施加较大的约束，高工资属于一种补偿性工资差别

B.企业规模越大，对员工进行直接监督的成本越高，因而就越需要采用效率工资等方案来对员工进行激励

C.大企业往往是劳动力市场价格的制定者。而不是劳动力市场价格的接受者

D.大企业的劳动力供给弹性更大一些

E.大企业中一旦出现职位空缺.会给企业带来较高的成本，因此需要用高工资降低员工的离职率