急性化脓性骨髓炎一旦确诊，早期足量联合应用抗生素，持续用药（）周以上。
A.1
B.2
C.3
D.4
E.5
参考答案：C
Network managers have long awaited practical voice-over-IP (VOIP)solutions. VOIP promises (71) network management and decreases costs by (72) a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’ s head -quarters with far -reaching branch offices can (73) tremendous amounts of (74) in long distance phone bills, provided that solution delivers POTS -like voice (75) over the Internet.
（72）处填（）。
A．converging
B．dividing
C．combine
D．bringing
对于市场挑战者而言，最有效和最经济的战略形式为（）。
A.正面进攻
B.侧翼进攻
C.包围进攻
D.迂回进攻
