According to recent reports, one of the rare animals, _____ crocodile, will be in danger of dying out in _____ 2020s.

A．a; /

B．the; the

C．the; /

D．/; the

位于防雷保护区之外的架空燃气管道及放散管应接地，按规定接地电阻不大于( )欧姆。

A．1

B．2

C．4

D．10