在职申硕英语考试易错题（2019/5/31）

在职申硕英语习题练习

在职申硕英语考试易错题（2019/5/31）

第1题：短期生产过程中平均产量与边际产量的关系是什么？

【分析题】：

Just over three years old and about four-feet tall. Methuselah is growing well. "It’s lovely."Dr. Sarah Sallon said of the date palm，whose parents may have provided food for the besieged Jews at Masada some 2 000 years ago. The little tree was sprouted in 2005 from a seed recovered from Masada, where rebelling Jews committed suicide rather than surrender to Roman attackers.
Radiocarbon dating of seed fragments clinging to its root, as well as other seeds found with it that didn’t sprout, indicate they were about 2 000 years old—the oldest seed known to have been sprouted and grown.
Sallon, director of the Louis L.Borick Natural Medicine ResearchCenter at Hadassah Medical Organization in Israel, updates the {{U}}saga{{/U}} of Methuselah in Friday’s edition of the journal Science.
One thing they don’t know yet is whether it’s a boy or girl.Date palms differ by sex, but experts can’t tell the difference until the tree is six or seven years old, Sallon saiD、
She hopes there’s a chance to use it to restore the extinct Judean date palm, once prized not only for its fruit but also for medicinal uses.
The researchers have had a look at the plant’sDNA, however, and found it shares just over half its genes with modern date cultivars(栽培品种)．
"Part of our project is to preserve ancient knowledge of how plants were used," Sallon said in a telephone interview. "To domesticate them so we have a ready source of raw material. "
Her MiddleEastern Medicinal Plant Project is working to conserve and reintroduce plants to the region where they once liveD、
"Many species are endangered and becoming extinct. Raising the dead is very difficult, so it’s better to preserve them before they become extinct," she saiD、
The oldest documented seed to be grown previously was a 1 300-year-old lotus, Sallon saiD、

第2题：
{{B}}Passage One{{/B}}

The word "saga" in paragraph 3 is closest in meaning to "______".A．extraordinary story
B．special function
C．detailed information
D．latest development
【单选题】： A B C D
Genetically modified (GM) foodstuffs are here to stay. That’s not to say that food produced by conventional agriculture will disappear,{{U}} (61) {{/U}}simply that foodbuying patterns will polarize. It may even be that GM food will become the food of{{U}} (62) {{/U}}because consumers come to appreciate the health benefits of reduced pesticide use.
The reason GM food will not go away is that we need a three-fold increase in food production by the year 2050 to keep{{U}} (63) {{/U}}with the world’s{{U}} (64) {{/U}}population growth to ten or eleven billion. It’s not just a question of more mouths to feed either.{{U}} (65) {{/U}}is often forgotten is that all these extra people will take up space,reducing the overall land{{U}} (66) {{/U}}for agriculture.
It may well be that in the long term it is the developing world{{U}} (67) {{/U}}benefits most from GM foods. It’s true that for the next ten years or so GM crops may be{{U}} (68) {{/U}}expensive.But the lesson of personal computers is applicable here—once the technology has been developed for money spinning crops,{{U}} (69) {{/U}}maize, soy beans and cotton,it will become{{U}} (70) {{/U}}for all.
This doesn’t mean, unfortunately, that families will{{U}} (71) {{/U}}, but severity and duration will be helped by an{{U}} (72) {{/U}}ability to produce and distribute fooD、
{{U}} (73) {{/U}}we move into this new era of agriculture we’re embarking on a journey the world has seen many number of times with experiments before. We have been refining species of wheat for several thousand years. Genetic engineers like me are not doing anything as{{U}} (74) {{/U}}as making a cabbage into a cauliflower{{U}} (75) {{/U}}has been done by plant breeders in the past.
We’re simply tapping into the whole gene pool, rather than concentrating on one species at a time.

第3题：

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