Computer microchips could become
smaller, faster and cheaper, thanks to scientists in the United States who have
developed a speedier method of printing minuscule patterns on silicon
chips. The discovery, by Stephen Chou and fellow scientists at Princeton University in New Jersey, could allow electronics manufacturers to increase the density of transistors on silicon chips by 100- fold and streamline production at the same time. Instead of taking 10 or 20 minutes to make a computer chip, the electrical engineers have imprinted features measuring I0 nanometers, or 10 millionths of a millimeter, on a computer chip in a quarter of a millionth of a second. The achievement, which could pave the way for more powerful computers and memory chips, is reported in the science journal Nature. "You just imprint the p A. Become hard again, B. Back to solitude. C. Become liquid. D. Stretch around. [单项选择]有人说,对土地的投资是风险最小的投资。这表明了()。
A. 土地经济供给的稀缺性 B. 土地用途的多样性 C. 土地用途变更的困难性 D. 土地增值性 [单选题]信号微机监测系统光电隔离模块工作电压一般为( )模块,用于交流、直流均可。331010102
A.5V B.12V C.16V D.24V [简答题]试述现代管理理论产生的历史背景。
[单项选择]若两物体的主视图相同,下面说法中不正确的是()
A. 两物体形状必然相同 B. 可能由相同的形体以不同的相对位置所组成 C. 可能由不同的形体以不同的相对位置所组成 D. 可能由不同的形体以相同的相对位置所组成 [单选题]王女士,28岁,主诉1周来白带增多,外阴瘙痒,为明确诊断,需做妇科检查了解其白带量,颜色,性状和气味,首先应做的检查是
A.外阴部检查 B.阴道窥器检查 C.双合诊 D.三合诊 E.肛-腹诊 [填空题]公差:是允许的尺寸变动量,是最大极限与最小极限尺寸代数差的( )。
[单项选择]肾移植后超急性排斥反应的主要机制是由于
A. 循环抗体 B. 细胞免疫 C. 术后感染 D. 术后低血容量 E. 主要HLA配型不当 [单项选择]交感神经兴奋可引起释放增多的是()
A. 抗利尿激素 B. 醛固酮 C. 肾素 D. 促红细胞生成素 E. 前列腺素 [单项选择] Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A), B), C) anti D). For questions 8-10, complete the sentences with the information given in the passage.
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