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An 802.1Q trunk is not coming up between two switches. The ports on both switches are configured as "switchport mode desirable." Assuming that there is no physical issue，choose two possible causes.（）
You are the desktop administrator for your company. The company's network contains a RIS server, a DHCP server, and a DNS server. You need to install Windows XP Professional on a computer that does not have a CD-ROM drive. The computer has the following configuration: a Pentium III 1-GHz processor, a 5-GB hard disk, 128 MB of RAM, a modem in the first PCI slot ,an Ethernet card in the last ISA slot. You attempt to install Windows XP Professional on the computer by using a RIS bootable floppy disk. However, you are unable to connect to the RIS server. What should you do?（）
下列不属于短期奖励计划的是（）
男性，50岁，左上腹饱胀半年，进食后加剧。查：脾大，Hb80g／L，WBC3．2×109／L，BPC350×109／L，血片发现泪滴状红细胞，疑诊为原发性骨髓纤维化。下列检查中最有助于排除其他血液病所致的继发性骨髓纤维化的是：（）
强酸性阳离子交换树脂的离子交换基团是（）
不能在一个己打开的工作簿中增加新工作表的操作是（）。
孔隙成因类型
重症多形红斑治疗中应尽早足量给予的是（）
该病人初步诊断为（ ）。
《中华人民共和国侵权责任法》第六十三条规定：医疗机构及其医务人员不得违反（ ）实施不必要的检查：（）
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