测距码调制到载波上的基本原理是怎样的？

阅读短文，根据短文内容，按要求答题。

      Ronald Reagan was the only actor to be president of (A) _______, but some film stars have also

become successful public officers. (B) One of them is Shirley Temple, who is remembered throughout the

world as a little girl who sang and danced in many films.

      (C) Shirley Temple began to make films at the age of five, and she was only nine when she played the

part of Heidi. In almost every part of the world where films are seen on television, children and their parents

still enjoy Heidi and other films of Shirley Temple.

      (D)当她21岁时, 她已经迈出了电影圈子。Twenty years later, many people thought of her as a little

girl that Americans have always loved in the films. However, others know her as an excellent woman with

knowledge of world problems. One of the people who recognized these important abilities was President

Richard Nixon, who sent her to work in the United Nations in 1969.

     (E) Americans are becoming to realize that many film stars have other talents besides acting.

1. 在(A) 的空白处填入一个适当的词语_________.

2. 将划线部分(B) 改写为 One of them is Shirley Temple, who is remembered _________ the world as a

    little girl who sang and danced in many films.

3. 将划线部分(C) 译成汉语_____________________________________

4. 将划线部分(D) 译成英语_____________________________________

5. 将划线部分(E) 译成汉语_____________________________________

已知点P（a，3）、Q（-2，b）关于x轴对称，则a+b=______．

读《红楼梦》判词，猜猜都是谁。

①才自精明志自高，生于末世运偏消。清明涕送江边望，千里东风一梦遥。

②子系中山狼，得志便猖狂。金闺花柳质，一载赴黄泉。

③勘破三春景不长，缁衣顿改昔年妆。可怜绮户侯门女，独卧青灯古佛旁。

④情天情海幻情深，情既相逢必主淫。漫言不肖皆荣出，造衅开端实在宁。

非周期信号的幅度频谱是（）。

A.连续的

B.离散的，谱线正负对称排列

C.跳变的

D.离散的，谱线均匀排列

高启诗歌在艺术上的特点是（）

A.兼师汉魏六朝各家

B.兼师唐宋以来各家

C.兼师汉魏以来各家

D.兼师六朝唐宋各家