课文 · 精读
单元概要
本课写哈勃望远镜发射后出现故障、再准备修复的过程。重点不是单纯记科技名词,而是读懂“先失望、后修复、再期待”的说明文逻辑,并掌握 by the time 引出的将来完成时。
精读导图 1. 先写哈勃发射成功,却马上暴露故障。 2. 再写 NASA 的修复方案和航天安排。 3. 最后落在“修好后将带来巨大科研价值”的期待上。 精读关注 - put ... right 的修复含义 - by the time + 将来完成时
单词表
| 单词 | 音标 | 释义 | 精讲 |
|---|---|---|---|
| telescope | /ˈtelɪskəʊp/ | 望远镜 |
|
| launch | /lɔːntʃ/ | 发射 |
|
| faulty | /ˈfɔːlti/ | 有故障的 |
|
| astronaut | /ˈæstrənɔːt/ | 宇航员 |
|
| shuttle | /ˈʃʌtl/ | 航天飞机 |
|
| grab | /ɡræb/ | 抓住 |
|
| atmosphere | /ˈætməsfɪə(r)/ | 大气层 |
|
| galaxy | /ˈɡæləksi/ | 星系 |
|
| universe | /ˈjuːnɪvɜːs/ | 宇宙 |
|
| Hubble | — | n 哈勃 | — |
| space | — | n 空间(指宇宙空间) |
|
| billion | — | n 10亿 | — |
| Endeavour | — | n “奋进” 号 | — |
| robot-arm n 机器手 | — | — |
|
| distant | — | adj 遥远的 | — |
| eagle eye | — | n 鹰眼,一种仪器 | — |
短语
| 短语 | 意思 |
|---|---|
| at a cost of | 耗资…… |
| right from the start | 从一开始 |
| put ... right | 把……修好 |
| send up | 发射;送上去 |
| a great deal about | 大量关于……的信息 |
| by the time | 到……的时候 |
语法点
be going to / will be doing 的计划感
NASA is now going to... / The shuttle will be taking... 都不是随意预测,而是已经安排好的后续动作。
- We are going to repair the engine tomorrow.
- This time next week, they will be flying to Paris.
最高级 + we have ever seen
the clearest pictures ... that we have ever seen 用最高级加强科技成果的突破性。
- It was the most exciting view I had ever seen.
- This is the best result we have ever achieved.
by the time + 将来完成时
By the time you read this, ... will have sent... 强调“到未来某一时点之前已经完成”的结果。
- By the time you arrive, we will have finished dinner.
- By next month, they will have built the bridge.
读写提示
- 科技说明文复述时要抓“问题 - 解决 - 价值”三步,不要只堆术语。
- 课文里的时间点很重要,April 20, 1990 和 by the time 都要会定位。
- 概括哈勃的意义时,最好写出 clearer pictures 和 knowledge of the universe。
- 碰到科普短文,先分清“现状问题”和“未来预期”两层。
考点
4
考点
4哈勃一开始为什么让人失望?
选择题精讲
7
选择题精讲
7Multiple choice questions
a. the cost of sending satisfactory pictures was terrible
b. there was a problem with its main mirror
c. it was a long time since it was launched into space
d. it was high above the earth's atmosphere
显示答案与解析
a. will tell us a great deal about the universe
b. cost a lot but was almost worthless
c. will measure the size of the earth
d. requires constant care from the astronauts
显示答案与解析
constant [5κΧνστΕντ] n.[数、物]常数, 恒量 adj.不变的, 持续的, 坚决的
a. for b.so that
c. so long as d.which
显示答案与解析
for sb to do sth基本结构
so that+句子
so long as+句子 : 表示只要
which + 句子
a. had problems
b. was distant
c. was the clearest d. requires repairs
显示答案与解析
had problems 有问题
reauires repairs需要修理
there was a problem with its main mirror.
what's the trouble with you?
problem with sth (习惯用法) 如: There was a problem with its main mirror.
a. below
b. over
c. within
d. outside
显示答案与解析
above 在...之上(凌空)
above the earth’s atmosphere 在大气层的上方