2016年6月大学英语四级阅读每天一练(25)
距离2016年6月四级考试越来越近了，现在正是大家备考英语四级最好的时机。新东方网英语四级频道为大家整理了英语四级阅读每天一练，希望可以为大家带来帮助。Flying over a desert area in an airplane, two scientists looked down with
trained eyes at trees and bushes. After an hour's 11 one of the scientists wrote
in his book, "Look here for 12 metal. " Scientists in another airplane, flying
over a mountain region, sent a 13 to other scientists on the ground, "Gold
possible. " Walking across hilly ground, four scientists reported, "This ground
should be searched for metals. " From an airplane over a hilly wasteland a
scientist sent back by radio one word, "Uranium. "
None of the scientists had X-ray eyes: they had no 14 powers for looking
down below the earth's surface. They were 15 putting to use one of the newest
methods of 16 minerals in the ground—using trees and plants as 17 that certain
minerals may lie beneath the ground on which the trees and plants are
growing.
This newest method of searching for minerals is 18 on the fact that
minerals deep in the earth may 19 the kind of bushes and trees that grow on the
surface.
At Watson Bar Creek, a brook six thousand feet high in the mountains of
British Columbia, Canada, a mineral search group gathered bags of tree seeds.
Boxes were filled with small branches from the trees. Roots were dug and put
into boxes. Each bag and box was 20 marked. In a scientific laboratory the parts
of the forest trees were burned to ashes and tested. Each small part was
examined to learn whether there were minerals in it.
A. signs
B. sufficiently
C. locating
D. affect
E. merely
F. magic
G. hints
H. carefully
I. finding
J. message
K. flight
L. probable
M. revealing
N. based
O. information
答案：11. K 12. L 13. J 14. F 15. E 16. C 17. A 18. N 19. D 20. H
页:
[1]