一个长方形和一个正方形的面积相等，已知正方形的边长是12厘米，_爱下问搜题

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问题填空题

一个长方形和一个正方形的面积相等，已知正方形的边长是12厘米，长方形的长是16厘米，它的宽是多少厘米？

答案

12×12÷16=9（厘米）；

答：长方形的宽是9厘米．

选择题

___________World Expo is regarded as the Olympic Games of the economy, science and technology, ___________expert said.

A．A; an

B．The; an

C．The; a

D．A; the

单项选择题

35．Applications put computers to pratical business (1) , but below the (2) it’s the heart of an operating system—the kernel that provides the technical wizardry to juggle multiple program, connect to networks and store (3) . A traditional kernal provides all the functions for applications. The kemal (4) memory, I/O devices and parcels out processor time.
The kernel also supports security and fault (5) , which is the ablity to recover automatically when parts of the system fail.

(1)

A．skip

B．smile

C．smoke

D．specify