阅读下面古诗，完成后面的题目。（5分）

闻王昌龄左迁龙标遥有此寄李白

杨花落尽子规啼，闻道龙标过五溪。

我寄愁心与明月，随风直到夜郎西。

小题1:“杨花落尽子规啼”一句运用了            的表现手法，为全诗创设了一种      

          的氛围。（2分）

小题2:人们对“我寄愁心与明月，随风直到夜郎西”两句诗评价极高，请你赏析这两句诗的精妙之处。（3分）

The presentation layer is concerned with the（1） and semantics of the information exchanged between two systems. The processes in two systems are usually exchanginginformation in the form of character（2）numbers, and so on. The information should bechanged to bit （3） before being transmitted. Because different encoding systems, thepresentation layer is responsible for （4）between these different encoding methods. Thepresentation layer at the sender changes the information from its sender-dependent format into acommon format. The presentation layer at the receiving machine changes the common format intoits （5） dependent format.

（3）是（）

A.systems

B.characters

C.layers

D.streams