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【多选题】
下面有关顶棚金属线条说法正确的是()A.
材薄质轻
B.
一般不单独使用
C.
断面形式多样
D.
可以与次龙骨固定
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反馈参考答案：
举一反三
【简答题】消除交越失真的互补输出级、准互补输出级 判断下列说法是否正确，对者选“YES”错者选“NO”。 （1）交越失真属于三极管的饱和失真。
【简答题】Some Internet service providers worried that the Internet will break down under the pressure of millions of people downloading programs ______.
【简答题】通过局域网接入Internet，只需申请一个IP地址，局域网内的所有计算机就都可以上网了，它是通过【 】实现的。
【多选题】Which of the following are true for service providers?
A.
Photo sharing, video sharing, and user-generated content in blogs and social network sites are all services provided to customers.
B.
Data storage is an online computer service
C.
Service providers offer consumers valuable, convenient, time-saving, and low-cost alternatives to traditional service
D.
There are no free services
【多选题】Which of the following are 对 for service providers?
A.
Photo sharing, video sharing, and user-generated content in blogs and social network sites are all services provided to customers.
B.
Data storage is an online computer service.
C.
Service providers offer consumers valuable, convenient, time-saving, and low-cost alternatives to traditional service.
D.
There are no free services.
【简答题】通过局域网接入Internet，只需申请一个IP地址，局域网内的所有计算机就都可以上网了，它是通过 【9】 实现的。
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