相邻两个（）间隔的年限称为林木结实的间隔期。
A、欠年
B、丰年
C、平年
D、闰年
参考答案：B
As for the influence of Internet, nowhere ( ) the results more clearly than in the US.
A．we have seen
B．we had seen
C．seen we have
D．have we seen
500kV变电站计算机监控系统计划检修工作应有详细的工作内容、工作计划和安全措施，应提前几个工作日逐级上报申请（）
A.1
B.2
C.3
D.4
E.5
