下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。 The World’s Longest Bridge
Rumor has it that a legendary six-headed monster lurks in the deep waters
of the Tyrhenian Sea between Italy and the island of Sicily. (46)
When completed in 2010, the world’s longest bridge will weight nearly
300,000 tons—equivalent to the iceberg that sank the Titanic—and stretch 5
kilometers long. "That’s nearly 50 percent longer than any other bridge ever
built," says structural engineer Shane Rixon. (47)
They’re suspension bridges, massive structures built to span vast
water channels or gorges. A suspension bridge needs just two towers to shoulder
the structure’s mammoth weight, thanks to hefty supporting cables slung between
the towers and anchored firmly in deep pools of cement at each end of the
bridge. The Messina Strait Bridge will have two 54,100-ton towers, which will
support most of the bridge’s load. The beefy cables of the bridge, each 1.2
meter in diameter, will hold up the longest and widest bridge deck ever
built. When construction begins on the Messina Strait Bridge in
2005, the first job will be to erect two 370 meter-tall steel towers.
(48) . Getting these cables up will be something. It’s not
just their length—totally 5.3 kilometers—but their weight. (49)
After lowering vertical "suspender" cables from the
main cables, builders will erect a 60 meter-wide 54,630-ton steel roadway, or
deck—wide enough to accommodate 12 lanes of traffic. The deck’s weight
will pull down on the cables with a force of 70,500 tons. In return, the cables
yank up against their firmly rooted anchors with a force of 139,000
tons—equivalent to the weight of about 100,000 cars. Those anchors are
essential. (50) A. Some environmentalists
are against the project on biological grounds. B. What do the
world’s longest bridges have in common C. If true, one day you
might spy the beast while zipping (呼啸而过) across the Messina Strait
Bridge. D. They’re what will keep the bridge from going
anywhere. E. The second job will be to pull two sets of steel
cables across the strait, each set being a bundle of 44,352 individual steel
wires. F. They will tip up the scales at 166,500 tons—more than
half the bridge’s total mass.