企业信用策略中的消费者信用主要包括未结算帐目信用,长期付款信用和信用卡等类型。()
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Which three statements are true about the data traffic characteristics of voice traffic? ()
A. latency must be kept below 150 ms
B. latency is not a concern as long as jitter is kept below 30 ms
C. voice packets do not require a specific type of queuing
D. voice packets are rather small
E. voice packets require TCP for rapid retransmission of dropped packets
F. voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload
男,35岁,需做骨移植术,现拟采取腓骨进行移植,术中操作及注意点,下列不对的是()。
A. 采取腓骨时,应保留腓骨的下1/3段,以使踝关节稳固
B. 采用硬脊膜外阻滞麻醉,侧卧位,取骨肢体在上
C. 切口起自腓骨小头上方8~12cm处的股二头肌腱后缘,沿腓骨后缘至小腿中、下1/3交界处
D. 截骨时腓骨中段后侧的腓骨滋养动脉应先予以结扎
E. 术中注意保护股二头肌后内侧的腓总神经
晶闸管组成的整流与逆变电路的常用换流方式有()换流;()换流;()换流;()换流。
痛、乏力、心跳加速,有的伴有恶心、呕吐、腹胀、烦躁不安、呼吸困难。其最大可能是()
A. 河豚鱼中毒
B. 四季豆中毒
C. 亚硝酸盐中毒
D. 沙门菌中毒
E. 葡萄球菌肠毒素中毒