在Excel的A1单元格中输入函数“=ROUND(-2.1475,2)”,则A1单元格中显示的值为 (58) 。
A. 2.1
B. 2.15
C. -2.147
D. 2.148
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A (71) is a device that enables the computer to handle sounds.
A. video card
B. network card
C. sound card
D. card games
若某工厂六月份的产值比五月份的产值增加10%,七月份的产值比六月份的产值减少10%,则五月份的产值 (26) 。
A. 与七月份的产值相等
B. 比七月份的产值多1/100
C. 比七月份的产值多1/99
D. 比七月份的产值少1/100
According to the passage, we can avoid a worldwide water shortage in the future by
A. increasing rainfall.
B. reusing water and utilizing sea-water.
C. cutting down our consumption of water.
D. reducing the number of factories producing steel.
(7) 属于系统软件,它直接执行高级语言源程序或与源程序等价的某种中间代码。
A. 编译程序
B. 预处理程序
C. 汇编程序
D. 解释程序