作为一种洁净能源，风能的开发越来越受到人们的关注。读陆地与海上风速剖面比较图回答7～9题。

小题1:相同高度的风塔其发电能力

A．海上高于陆地

B．陆地高于海上

C．海上陆上相同

D．无法判定小题2:随着高度的增加，风速

A．陆地向上增速快

B．海洋向上增速快

C．40米高度以内海上增速快

D．40米高度以上陆上增速快小题3:关于海上和陆上风速的叙述正确的是

A．风速差距由地面向高空增大

B．风速差距由海面向高空增大

C．近地面增速小是地物阻力造成的

D．海上增速小是海浪阻力造成的

astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost (141) . For example, the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (142) . Hence, additional maintenance procedures must be maintained and administrative records are (143) . The duplication of transport facilities to carry (144) network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space and an increase in power connections and power consumption, migration of these (145) network elements to IP-based DCns is alogical strategy.

A．overlook

B．overlie

C．overlay

D．overleap