平流层的特点。
参考答案:
1.气温随高度的增加而增加
2.大气运动以平流为主,平流层因此得名,该层气流相对平稳
3.含水汽和杂质较少,云,雨现象几乎绝迹。
Frame Relay is simplified form of (25) , similar in principle to (26) , in which synchronous, frames of data are routed to different destinations depending on header information . Packets are routed throught one or more Virtual Circuits known as (27) . Most Virtual Circuits are (28) ,which means that the network provider sets up all DLCI connections at subscription time. (29) are also part of the Frame Relay specification . They privide a link that only lasts only as long as the session.
26()
A.X.21
B.X.25
C.X.28
D.X.29
卢州老窖,桂林三花酒,元酒,汾酒分别属于()。
A.浓香型,米香型,绍兴酒,清香型
B.清香型,米香型,浓香型,浓香型
C.酱香型,浓香型,绍兴酒,清香型
D.浓香型,酱香型,米香型,清香型