The first telegraph cable was laid under the sea between England and France in 1850.Cables are much 1 and heavier than telegraph wires.There are a number of reasons for this:one reason is that the salt water of the sea harms 2 telegraph wires,and so they have to be 3 , another is that,because electricity 4 easily through water,wires have to be 5 to prevent electric signals which are passing through them 6 escaping and getting lost in the sea;a third reason is that cables have to be very strong 7 they will break while they are being 8 along the bottom of the sea from a ship sailing on the surface.
The 9 cables that men tried to lay 10 England and America broke and were 11 during storms.At last,after nine years of hard work,the two English-speaking nations of Britain and America were 12 in 1866 by the electric telegraph under the sea.
Later,all the different 13 of the world were joind up by a 14 of cables.It is 15 easy to send a message by cables as it is to 16 an ordinary telegram,and it takes no longer for a message to 17 half way round the world than from one town to the 18 .Every hour of the day and night 19 are being flashed under the ocean to and20 every country in the world.
1. A.thicker B.better C.longer D.larger
2. A.ordinary B.special C.plain D.simple
3. A.raised B.fixed C.protected D.repaired
4. A.comes B.passes C.escapes D.sends
5. A.hid B.circled C.covered D.dressed
6. A.from B.through C.by D.into
7. A.so B.or C.but D.and
8. A.lined B.pulled C.laid D.covered
9. A.best B.most C.first D.thickest
10. A.between B.around C.beside D. among
11. A.cast B.thrown C.drawn D.lost
12. A.fixed B.joined C.met D.mixed
13. A.cities B.countries C.parts D.peoples
14. A.set B.packet C.sort D.network
15. A.very B.so C.as D.not
16. A.make B.send C.use D.write
17. A.find B.travel C.visit D.meet
18. A.next B.second C.last D.another
19. A.news B.pictures C.messages D.telegrams
20.A.out B.in C.from D.off
1—5 AACBC 6—10 ABCCA 11—15 DBBDC 16—20 BBACC
A. Profits enlarging B. Technology developing C. Education investing D. Benefits transferring E. Dominance disappearing F. A nation rising |
The following is an imaginary diary entry written by US president. This diary is part of Global Trends 2025, which was written by the US National Intelligence Council
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The
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The
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Global wealth and economic power will shift from West to East.
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The transition from old fuels to new will be slow, as will the development of new technologies that present feasible alternatives to fossil fuels or help eliminate food and water problems. All current technologies are inadequate, and new ones will probably not be commercially possible by 2025