如果承包人要求延期开工，应当由（）批准。 发包人。 工程师。 承包人代表。 建设行政主管部门。
Refer to the exhibit. Which statement about dynamic routing protocols for this network is true? （） No dynamic interior routing protocol can summarize as shown。 Unless configured otherwise, EIGRP would automatically summa rize the prefixes as shown in the exhibit。 With this IP addressing scheme, EIGRP can be manually configured to summarize prefixes at the specified summarization points。 The IP address design lends itself to OSPF Each summarizing router would be an ABR, summarizing to the next area in the address hierarchy。
作为一名专业技术人员要多利用（）来看问题，多利用（）来解决问题，还要不断地去学习和借鉴别人的成功经验，并把它们灵活地运用到自己的工作中来。 空间、想象。 整体、动态。 长远、眼前。
起重电气设备发生火灾时，应立即切断电源，并用（）进行灭火。
New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? （） cut-through。 fragment-free。 frame-filtering。 store-and-forward。 802.1q forwarding。 VTP transparent mode。
对图层或选区作旋转操作的正确方法是（）。
