问题
单项选择题
以下关于ROM的叙述中，错误的是( )。
A．ROM中的信息只能被CPU读取
B．ROM主要用来存放计算机系统的程序和数据
C．我们不能随时对ROM改写
D．ROM一旦断电信息就会丢失
答案
参考答案：D
解析： ROM为只读存储器，只能读出不能写入。而RAM是随机存储器，其所存内容一旦断电就会丢失。
搜题请搜索小程序“爱下问搜题”
以下关于ROM的叙述中，错误的是( )。
A．ROM中的信息只能被CPU读取
B．ROM主要用来存放计算机系统的程序和数据
C．我们不能随时对ROM改写
D．ROM一旦断电信息就会丢失
参考答案：D
解析： ROM为只读存储器，只能读出不能写入。而RAM是随机存储器，其所存内容一旦断电就会丢失。
| In most cases, you can transplant a tree successfully, at any time, if you follow the instructions for planting a tree. The most important thing is to dig out enough roots, but this process is difficult with a large tree. When you dig out the tree, leave a ball of earth around its roots. This ball of earth should measure about a foot wide for every inch of the tree trunk’s diameter. Dig deep enough to avoid cutting off too many taproots. It is wise to call in a professional tree expert to transplant a tree more than a few inches in trunk diameter. |
The larger the trunk of the tree you are transplanting, ______.
A．the less it matters whether you call in a tree expert
B．the more you should avoid cutting off the taproots
C．the larger the ball of earth you must leave around the roots
D．the easier it is to dig out sufficient roots