第2题: [单项选择]关于阵发性睡眠性血红蛋白尿描述不正确的是() A. 红细胞膜获得性缺陷所致 B. 属于血管内溶血 C. 红细胞膜对抗体IgA高度敏感 D. 发病隐匿,病情轻重不一 E. PNH细胞按敏感程度分为三型 参考答案:C
第3题:[单选题] Stress on the topping lift of a swinging boom can be reduced by ______. A.Rigging a back stay B.Raising the boom C.Increasing the mechanical advantage of the cargo purchase D.Taking all slack out of the preventer 参考答案:B 【参考译文】转动的吊杆千斤索的应力能够通过提升吊杆而减少。 【解 析】topping lift千斤索 slack out松出
第16题: [单项选择]Which command displays the CHAP authentication process as it occurs between two routers?() A. debug authentication B. debug chap ppp C. debug chap authentication D. debug ppp authentication 参考答案:D