凡能自发地不断放出人们感觉器官不能觉察到的射线的物品，称为放射性物品。（）
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Which of the following solutions will encapsulate IPv6 packets with IPv4 headers？（）
A. Create an IPv4 tunnel and assign the tunnel IPv6 addresses
B. Create IPv4 interfaces on both ends of the network， and use either static routes or a routingprocess to direct IPv6 packets through those interfaces
C. IPv6 packets cannot be encapsulated with IPv4 headers because the addresses are notcompatible
D. Create IFV6 interfaces on both ends of the network， and use static routes to point the IPv4address to those interfaces
E. Use an IPv6 routing protocol like OSPFv3 and assign IPv4 packets to that process
F. Create an IPv4 tunnel and use the tunnel mode ipv6ip command
若设备内的温度为200℃左右，现拟用热电阻测量，用于铜电阻价格便宜，故可选用。
A. 正确
B. 错误
排污单位必须如实填写申报登记表，经单位主管部门核实即可，不需报当地环境保护行政主管部门审批。
A. 正确
B. 错误
制动检测时，应匀速缓慢而平稳的踩下踏板，严禁突然发力踩下踏板来测定前轮和后轮的主制动力，测后制动力时严禁拉手刹，拉手刹检测时应逐渐经过6～9齿。
A. 正确
B. 错误
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