[单选题]《电气化铁路有关人员电气安全规则》第四十六条：电气化铁路区段进行架空电力线路维修、施工作业时，在与铁路长距离平行作业区段内，至少每隔l千米加装l组（ ）。
A.回流线
B.加强线
C.馈电线
D.接地线

　　At our house, nobody gets more mail than Jake: catalogs, coupons, and offers to subscribe to magazines.{{U}} (61) He is also urged to donate to worth causes and take advantage of some pretty incredible credit-card offers.{{/U}}
He ignores all of them. What do they expect He’s a dog.
　　(62){{U}}It all started when I used Jake’s name as an assumed name on the Internet. in an attempt to protect what’s left of my privacy.{{/U}} Before I knew it, junk was pouring in, proving once again that these days every move you make online can be, and often is, carefully watched and recorded by people who don’t know you from your dog--everyone from ad and insurance agencies to nonprofit groups and even the dreaded telemarketers. And let’s not forget the more, shall we say, unscrupulous characters.
　　{{U}}(63) We’ve all heard horror stories about people whose identities, in the form of credit card or Social Security numbers, were assumed by crooks. Id