| In recent years a new farming
revolution has begun, one that involves the{{U}} (21) {{/U}}of life at a
fundamental level — the gene. The study of genetics has{{U}} (22)
{{/U}}a new industry called biotechnology. As the name suggests, it{{U}}
(23) {{/U}}biology and modem technology through such techniques as
genetic engineering. Some of the new biotech companies specialize{{U}} (24)
{{/U}}agriculture and are working feverishly to duplicate seeds that give a
high yield, that{{U}} (25) {{/U}}diseases, drought and frost, and that
reduce the need for{{U}} (26) {{/U}}chemicals.{{U}} (27)
{{/U}}such goals could be achieved, it would be most beneficial. But some have
raised concerns about genetically engineered crops. In nature, genetic diversity is created within certain space. A rose{{U}} (28) {{/U}}be crossed with a different ki A. for B. on C. to D. at [单项选择]胆酸在肠道细菌作用下可转变为
A. 鹅脱氧胆酸 B. 脱氧胆酸 C. 石胆酸 D. 甘氨胆酸 E. 牛磺胆酸 [单选题]员工（ ）纳入降岗管理。
A.年度绩效等级为C且上年度为C的 B.年度绩效等级为D且上年度为C的 C.年度绩效等级为C且上年度为D的 D.年度绩效等级为D且上年度为D的 [简答题]转基因动物的筛选方法有哪些？
[单选题]60kg／m一级再用轨(整修前)要求剥落掉块长度小于（ ）。
A.1mm B.3mm C.5mm D.8mm [填空题]In less than 30 years’’ time the Star Trek holodeck will be a reality. Direct links between the brain’’ s nervous system and a computer will also create full sensory virtual environments, allowing virtual vacations like those in the film Total Recall.
71. There will be television chat shows hosted by robots, and cars with pollution monitors that will disable them when they offend. 72. Children will play with dolls equipped with personality chips, computers with in-built personalities will be regarded as workmates rather than tools, relaxation will be in front of smell-television,and digital age will have arrived.
According to BT’’ s futurologist, Ian Pearson, these are among the developments scheduled for the first few decades of the new millennium (a period of 1,000 years ), when supercomputers will dramatically accelerate progress in all areas of life.
73.Pearson has pieced together the work of hundreds of researchers around the world to produce a unique millennium
[判断题]采用高阶天线MIMO技术和正交传输技术可以提高平均吞吐量和频谱效率
A.正确 B.错误 [单选题]标记速度为160km/h的客车运行()(或距上次各级修程不超过1年)实施A1级检修。
A.10万km2万km B.20万km2万km C.30万km2万km D.40万km2万km [判断题]K型扣件的主要作用是增强桥上线路稳定。
A.正确 B.错误 我来回答: 提交
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