鲎溶解试验用来检测血清及脑脊液中的内毒素,对诊断流脑有特异性。
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冷却器分()冷和()冷;冷却器是用来冷却热流体的()式换热器。
Which of the following statements are correct in regard to classless routing protocols?()
A. Discontiguous subnets are not allowed.
B. Variable length subnet masks are allowed.
C. RIP v1 is a classless routing protocol.
D. IGRP supports classless routing within the same autonomous system.
E. RIP v2 supports classless routing.
动物骨骼有些是空心的,从力学角度分析它有什么意义?
服装商品的差价有:服装的批零差价、()、服装的季节差价、()。