题目内容

Read the sentences about pirated software. They do not all belong in a paragraph for this assignment. Cross out the sentences that do not belong in this paragraph. Next to each sentence that remains, write a note telling what kind of information the sentence gives. (答案可拍照上传)1. Pirated software is one product that is counterfeit.2. Pirated music CDs are also a big problem, and they are very bad for musicians.3. I can buy pirated software in some small computer stores I know.4. You know it is pirated if it is very cheap.5. You can tell the software is pirated if the label is from a copy machine.6. Sometimes the seller gives you a CD that has no printing on it.7. Sometimes real copies of software cost more than a thousand dollars.8. I think it is wrong to buy pirated software because it is like stealing from the company.

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常用异步集成计数器是:

A. 74LS90
B. 74LS161

计数器按时钟控制方式不同分为 和 两种。

计数器按计数增减可分为:

A. 加法计数器
B. 减法计数器
C. 可逆计数器

计数器可用于计算输入脉冲个数,还常用于分频、定时等。

A. 对
B. 错

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