目前已知化合物的总数达3000万种,其中最多的是含()元素的化合物。
查看答案
对长时间高烧的病人,医生常在患者的身上涂酒精来降低体温,这是因为()。
A. 酒精易蒸发并在蒸发时吸收热量
B. 酒精易蒸发并在蒸发时放出热量
C. 酒精熔点较低,不易凝固
D. 酒精有香味,利于患者吸收
下列关于图片编辑说法中不正确的是()
A. 在Word中,图片的来源仅有两种:剪贴画和来自文件中的图片。
B. 剪贴画是Word预先准备好的一大堆图片。可以从中任意挑选,插入文档中。
C. 图片来源可以是使用绘图软件绘制的,或是通过扫描仪扫描获得的,也可能是从网络的某个站点下载的。
D. 插入文档中的图片过大,或者只需要图片的部分,可以使用图片工具栏的裁剪工具,沿图片四边裁剪。
The network is shown below, along with the relevant router configurations: With the topology found in the graphic, what will the R1 loopback 0 be in the R3 routing table?()
A. It will show up in the routing table as D 10.0.0/8
B. It will show up in the routing table as D EX 10.0.0.0/8
C. It will show up in the routing table as D 10.0.0./24
D. It will not show up in R3 routing table because there is no network command on R1
The EIGRP network is displayed in the following topology diagram: You work as a network technician. Study the exhibits carefully. If the command "variance 3" wasadded to the EIGRP configuration of R5, which path or paths would be chosen to route traffic fromR5 to network X?()
A. R5-R2-R1
B. R5-R2-R1 and R5-R3-R1
C. R5-R3-R1 and R5-R4-R1
D. R5-R2-R1,R5-R3-R1, and R5-R4-R1