[Problem Solving]
试题详情
题目:
If S is the sum of all the integers from 1 to 30, inclusive, what is the greatest prime factor of S ?
选项:
A、3
B、5
C、29
D、31
E、37
答案:
D
Line | Acting on the recommendation of a British |
government committee investigating the high | |
incidence in white lead factories of illness among | |
employees, most of whom were women, the Home | |
(5) | Secretary proposed in 1895 that Parliament enact |
legislation that would prohibit women from holding | |
most jobs in white lead factories. Although the | |
Womens Industrial Defence Committee (WIDC), | |
formed in 1892 in response to earlier legislative | |
(10) | attempts to restrict womens labor, did not discount |
the white lead trades potential health dangers, it | |
opposed the proposal, viewing it as yet another | |
instance of limiting womens work opportunities. | |
Also opposing the proposal was the Society for | |
(15) | Promoting the Employment of Women (SPEW), |
which attempted to challenge it by investigating the | |
causes of illness in white lead factories. SPEW | |
contended, and WIDC concurred, that controllable | |
conditions in such factories were responsible for | |
(20) | the development of lead poisoning. SPEW provided |
convincing evidence that lead poisoning could be | |
avoided if workers were careful and clean and if | |
already extant workplace safety regulations were | |
stringently enforced. However, the Womens Trade | |
(25) | Union League (WTUL), which had ceased in the late |
1880s to oppose restrictions on womens labor, | |
supported the eventually enacted proposal, in part | |
because safety regulations were generally not being | |
enforced in white lead factories, where there were | |
(30) | no unions (and little prospect of any) to pressure |
employers to comply with safety regulations. |
Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year. This year the plantings are being seriously damaged by bollworms. Bollworms, however, are not necessarily developing resistance to the cotton's insecticide. Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions. So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.
In evaluating the argument, which of the following would it be most useful to establish?
Line | In current historiography, the picture of a consistent, |
unequivocal decline in women’s status with the advent | |
of capitalism and industrialization is giving way to an | |
analysis that not only emphasizes both change (whether | |
(5) | improvement or decline) and continuity but also |
accounts for geographical and occupational variation. | |
The history of women’s work in English farmhouse | |
cheese making between 1800 and 1930 is a case in | |
point. In her influential Women Workers and the Industrial | |
(10) | Revolution (1930), Pinchbeck argued that the agricultural |
revolution of the eighteenth and early nineteenth | |
centuries, with its attendant specialization and enlarged | |
scale of operation, curtailed women’s participation in | |
the business of cheese production. Earlier, she | |
(15) | maintained, women had concerned themselves with |
feeding cows, rearing calves, and even selling the | |
cheese in local markets and fairs. Pinchbeck thought | |
that the advent of specialization meant that women’s | |
work in cheese dairying was reduced simply to | |
(20) | processing the milk. “Dairymen” (a new social category) |
raised and fed cows and sold the cheese through | |
factors, who were also men. With this narrowing of the | |
scope of work, Pinchbeck believed, women lost | |
business ability, independence, and initiative. | |
(25) | Though Pinchbeck portrayed precapitalist, |
preindustrial conditions as superior to what followed, | |
recent scholarship has seriously questioned the notion | |
of a golden age for women in precapitalist society. For | |
example, scholars note that women’s control seldom | |
(30) | extended to the disposal of the proceeds of their |
work. In the case of cheese, the rise of factors may | |
have compromised women’s ability to market cheese | |
at fairs. But merely selling the cheese did not | |
necessarily imply access to the money: Davidoff cites | |
(35) | the case of an Essex man who appropriated all but a |
fraction of the money from his wife’s cheese sales. | |
By focusing on somewhat peripheral operations, | |
moreover, Pinchbeck missed a substantial element | |
of continuity in women’s participation: throughout the | |
(40) | period women did the central work of actually |
making cheese. Their persistence in English cheese | |
dairying contrasts with women’s early disappearance | |
from arable agriculture in southeast England and | |
from American cheese dairying. Comparing these | |
(45) | three divergent developments yields some reasons |
for the differences among them. English cheese- | |
making women worked in a setting in which cultural | |
values, agricultural conditions, and the nature of | |
their work combined to support their continued | |
(50) | participation. In the other cases, one or more of |
these elements was lacking. |
The passage describes the work of Pinchbeck primarily in order to