“金字塔”型人才结构理论认为技术工人数量需求()工程师。
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0°探头探测75Kg/m钢轨时,声程为250mm,正常螺孔反射波应出现在刻度()。
A. 2格
B. 3格
C. 3.3格
D. 3.8格
8253有几种工作模式,对8253进行初始化编程时,有哪两条原则必须严格遵守?
某患者因腹部外伤疼痛难忍,伴恶心呕吐,提示有腹腔内脏损伤的主要体征是()
A. 腹式呼吸减弱
B. 腹膜刺激征
C. 移动性浊音可疑
D. 肠鸣音减弱
E. 肝浊音界缩小
When conducting an Assisted Site Survey, the WLSE does which of the following during the Radio Scan process?()
A. chooses the least congested channel
B. uses the configured channel
C. sets all access points to the same channel
D. steps through each of the allowed channel