What can we know according to the passage?
A. Great glaciers are very destructive.
B. All glaciers move southward.
C. The Mississippi-Missouri-Ohio system is larger than it was before the Ice Age.
D. The Great Lakes are now smaller than they were before the Ice Age.
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下列说法不正确的是()
A靠近闹市区的拉线加装绝缘子
B10kv两侧防雷地线断开50MM
C地锚应埋设牢固,拉线地锚应垂直于地面
D光纤固定接头采用熔接法
地质年代是将地球历史均分后划分出来的。()
参考答案:错误
“石炭纪”这一名称是由于这段时间植物茂密并形成大量煤炭而得名。()