A network administrator is planning a network installation for a large organization.The design requires 100 separate subnetworks,so the company has acquired a Class B network address.What subnet mask will provide the 100 subnetworks required, if 500 usable host addresses are required per subnet?()
A. 255.255.240.0
B. 255.255.248.0
C. 255.255.252.0
D. 255.255.254.0
E. 255.255.255.0
F. 255.255.255.192
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病历摘要:患者男性,63岁。因突发短暂性右上肢乏力,至持物掉地,当时神志清醒,无头晕,无头痛。即到医院就诊,检查:神志清醒,双瞳孔等圆等大(2.5mm~2.5mm),四肢肌力、肌张力正常,伸舌偏左,BP170/90mmHg、P84次/分、R20次/分。既往有高血压病2年,未作治疗。最好进行哪些检查?()
A. CT
B. MR
C. X线
D. CTA
E. DSA
F. TCD
G. B超
严禁使用他人()进行业务操作。
A. 操作卡
B. 密码
C. 名章
D. 业务印章
曲线半径不于300m,其加宽值为()。
A. 0mm
B. 5mm
C. 15mm