Which of the following statements is NOT a characteristic of

第1题：

第2题：

第3题：

第4题：

Which of the following statements describe the characteristic of link state routing protocols?（）

• A、The exchange of an advertisement is triggered by a change in the network.
• B、All routers exchange routing tables with each other in a multipoint network.
• C、Packets are routed based upon the shortest path to the destination.
• D、Paths are chosen depending on the cost efficiency factor.
• E、Every router in an OSPF area is capable of representing the entire network topology.
• F、Only the designated router in an OSPF area can represent the entire network topology.

第5题：

Which of the following statements is NOT considered a characteristic of farming in the late 18th and early 19th centuries?（）

• A、Use of artificial fertilizer.
• B、Introduction of new agricultural machinery.
• C、The'Open-field'system.
• D、A system of crop rotation.

第6题：

第7题：

Which of the following statements is NOT considered a characteristic of farming in the late 18th and early 19th centuries?（）

AUse of artificial fertilizer.

BIntroduction of new agricultural machinery.

CThe'Open-field'system.

DA system of crop rotation.

第8题：

第9题：

Several @functions can execute multiple statements. Which one of the following initializes a variable and can increment in during the operation?（）

• A、 @do 
• B、 @for 
• C、 @while 
• D、 @dowhile 

第10题：

Which of the following commands changes a file characteristic so that it cannot be seen with astandard directory query? （）

• A、attrib file.txt +h
• B、attrib file.txt +r
• C、ren file.txt
• D、attrib file.txt +s