练习材料：
NCE--第四册
Lesson 30-2 Exploring the sea-floor
A burst of activity associated with the laying of submarine cables soon confirmed the challenger's observation that many parts of the ocean were two to three miles deep, and the existence of underwater features of considerable magnitude.
Today, enough soundings are available to enable a relief map of the Atlantic to be drawn and we know something of the great variety of the sea bed's topography. Since the sea covers the greater part of the earth's surface, it is quite reasonable to regard the sea floor as the basic form of the crust of the earth, with, superimposed upon, it the continents, together with the islands and other features of the oceans. The continents form rugged tablelands which stand nearly three miles above the floor of the open ocean.
[ə] [bɜːst] [ɒv] [ækˈtɪvɪti] [əˈsəʊʃɪeɪtɪd] [wɪð] [ðə] [ˈleɪɪŋ] [ɒv] [ˌsʌbməˈriːn] [ˈkeɪblz] [suːn] [kənˈfɜːmd] [ðə] [ˈʧælɪnʤəz] [ˌɒbzə(ː)ˈveɪʃən] [ðæt] [ˈmɛni] [pɑːts] [ɒv] [ði] [ˈəʊʃən] [wɜː] [tuː] [tuː] [θriː] [maɪlz] [diːp], [ænd] [ði] [ɪgˈzɪstəns] [ɒv] [ˈʌndəˈwɔːtə] [ˈfiːʧəz] [ɒv] [kənˈsɪdərəbl] [ˈmægnɪtjuːd].
[təˈdeɪ], [ɪˈnʌf] [ˈsaʊndɪŋz] [ɑːr] [əˈveɪləbl] [tuː] [ɪˈneɪbl] [ə] [rɪˈliːf] [mæp] [ɒv] [ði] [ətˈlæntɪk] [tuː] [biː] [drɔːn] [ænd] [wiː] [nəʊ] [ˈsʌmθɪŋ] [ɒv] [ðə] [greɪt] [vəˈraɪəti] [ɒv] [ðə] [siː] [bɛdz] [təˈpɒgrəfi]. [sɪns] [ðə] [siː] [ˈkʌvəz] [ðə] [ˈgreɪtə] [pɑːt] [ɒv] [ði] [ɜːθs] [ˈsɜːfɪs], [ɪt] [ɪz] [kwaɪt] [ˈriːznəbl] [tuː] [rɪˈgɑːd] [ðə] [siː] [flɔːr] [æz] [ðə] [ˈbeɪsɪk] [fɔːm] [ɒv] [ðə] [krʌst] [ɒv] [ði] [ɜːθ], [wɪð], [ˌsjuːpərɪmˈpəʊzd] [əˈpɒn], [ɪt] [ðə] [ˈkɒntɪnənts], [təˈgɛðə] [wɪð] [ði] [ˈaɪləndz] [ænd] [ˈʌðə] [ˈfiːʧəz] [ɒv] [ði] [ˈəʊʃənz]. [ðə] [ˈkɒntɪnənts] [fɔːm] [ˈrʌgɪd] [ˈteɪbllændz] [wɪʧ] [stænd] [ˈnɪəli] [θriː] [maɪlz] [əˈbʌv] [ðə] [flɔːr] [ɒv] [ði] [ˈəʊpən] [ˈəʊʃən].
任务配置：
L0+L4
知识笔记 ：
练习感悟：
今天是课文第二部分，要注意生词submarine作形容词，可表示“海底的”；relief作名词，可表示“（地形的）凹凸高低”。注意掌握词组。
