The writer mentions the examples of Hitler and Mussolini to show that ______.
A. even the most cultured nation could produce dictators
B. massive popular support does not guarantee truth
C. they had the power of arousing people's emotion
D. they were both good at using faulty logic
钢筋砼管道安装时，应将()逐节调整正确。
A. 管节的边线及内底高程
B. 管节的中心及管顶面高程
C. 管节的中心及内底高程
D. 管节的边线及管顶面高程
高密度聚乙烯管用于道路下排水管道铺设，当槽深小于3m ，管径 300mm ≤ DN ≤1000mm ，沟槽的最小宽度应为() mm 。
A. De + 400
B. De + 600
C. De + 800
De＋ 1000
Part of the reason why the Internet becomes popular is that ______.
A. more and more people send messages over it
B. new message-searching tools are developed
C. the Internet is not monopolized by anyone
D. there is no authority over the Internet
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