地上LNG储罐与重要公共建筑物的安全间距不应小于（）米。
A.30
B.50
C.80
D.200
参考答案：C
钟嵘的《诗品》对《古诗十九首》有怎样的评价？
Bats are surprisingly long-lived creatures, some ____________ a life span of around 20 years.
A．having
B．had
C．have
D．to have
