下列哪些不是户式燃气炉的优点（） ["A.可以独立控制 ","B.按需供暖 ","C.有一定的节能优势 ","D.能耗不受户室之间供暖需求的影响"]
离心泵在检修后第一次启动前，需要灌水、排气，其目的是（） ["防止产生真空；","为使叶轮进口处产生负压；","防止水泵过载；","防止飞速。"]
During a redistribution of routes from OSPF into EIGRP， the administrator notices that none of theOSPF routes are showing up in EIGRP. What are two possible causes？（） ["Incorrect distribute lists have been configured","Missing ip classless command","CEF not enabled","No default metric configured for EIGRP"]
雇主责任保险的存在对于协调雇主与雇员关系有何益处？
由于有了印刷机，比手工印刷远为快捷和大量的复制成为可能，这就大大促进了书籍的（）能力。 ["生产","传送","发行","阅读"]
程序结构描述了整个程序的控制层次关系和各个部分的（）情况，而软件过程则着重描述各个模块的处理细节。
