Which statement describes the difference between a manually configured IPv6 in IPv4 tunnel versus an automatic 6to4 tunnel?（） [" An automatic 6to4 tunnel does not req uire dual - stack (IPv4 and IPv6) routers at the tunnel endpoints."," An automatic 6to4 tunnel allows multiple IPv4 destinations."," A manually configured IPv6 in IPv4 tunnel allows multiple IPv4 destinations."," A manually configured IPv6 in IPv4 tunnel does not require dual- stack (IPv4 and IPv6) routers at the tunnel endpoints."]
泰勒斯
城市土地的出让和转让只能采用公开拍卖的方式。
要提高大脑的实际利用率，就必须着力培养人的（）、（）、（）、（）的进取精神，激励人自觉从事创新思维。 ["乐于思考","勤于思考","善于思考","敢于思考"]
给水管道冲洗时，第一次冲洗应用清洁水冲洗至出水口水样浊度小于（）为止，冲洗流速应大于1.0m/s。 ["A.2NTU ","B.3NTU ","C.4NTU ","D.5NTU"]
焊瘤
