为防止绞接顶梁梁头扎破金属网，可利用旧木料在（）处垫好。 ["梁头","网头","梁尾","梁窝"]
Refer to the exhibit. How would you get the 1.1.1.1 network into the OSPF database？ （） [" Configure RTA as an ASBR"," Redistribute connected routes on RTA into OSPF"," Set up a virtual link between area 1 and area 0"," Set up a virtual link between area 1 and area 2"," Add a static route into RTB and enter it into OSPF"," Place a network 1.1.1.0 0.0.0.0 command into RTB"," Set up a unique router ID on RTA using an RFC 1918 address"," Change area 0 on RTB to area 1"]
声波在传播过程中振幅随传播距离的增大而逐渐减少的现象称为衰减。产生衰减的原因有（） ["吸收衰减","散射衰减","扩散衰减","桩侧土阻力"]
东方体育文化包含了中国传统体育文化和（）等体育文化圈。 ["印度体育文化","日本体育文化","伊斯兰体育文化","朝鲜体育文化"]
高空作业时，要身系（）。 ["绳子","腰带","安全带","高空安全带"]
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