Paragraph 9:
The relative amount of these two kinds of water varies greatly
from one kind of rock or sediment to another, even though their porosities
may be the same. What happens depends on pore size. If the pores are large,
the water in them will exist as drops too heavy for surface tension to hold,
and it will drain away; but if the pores are small enough, the water in them
will exist as thin films, too light to overcome the force of surface tension
holding them in place; then the water will be firmly held.
12. Which of the sentences below best expresses the essential information in
the highlighted sentence in the passage? Incorrect choices change the
meaning in important ways or leave out essential information.
○Surface tension is not strong enough to retain drops of water in rocks with
large pores but it strong enough to hold on to thin films of water in rocks
with small pores.
○Water in rocks is held in place by large pores and drains away from small
size pores through surface tension.
○Small pores and large pores both interact with surface tension to determine
whether a rock will hold water as heavy drops or as a thin film.
○If the force of surface tension is too weak to hold water in place as heavy
drops, the water will continue to be held firmly in place as a thin film when
large pores exist.
答案: (A) 但我想問的是, 為什麼(C)不可以
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The relative amount of these two kinds of water varies greatly
from one kind of rock or sediment to another, even though their porosities
may be the same. What happens depends on pore size. If the pores are large,
the water in them will exist as drops too heavy for surface tension to hold,
and it will drain away; but if the pores are small enough, the water in them
will exist as thin films, too light to overcome the force of surface tension
holding them in place; then the water will be firmly held.
12. Which of the sentences below best expresses the essential information in
the highlighted sentence in the passage? Incorrect choices change the
meaning in important ways or leave out essential information.
○Surface tension is not strong enough to retain drops of water in rocks with
large pores but it strong enough to hold on to thin films of water in rocks
with small pores.
○Water in rocks is held in place by large pores and drains away from small
size pores through surface tension.
○Small pores and large pores both interact with surface tension to determine
whether a rock will hold water as heavy drops or as a thin film.
○If the force of surface tension is too weak to hold water in place as heavy
drops, the water will continue to be held firmly in place as a thin film when
large pores exist.
答案: (A) 但我想問的是, 為什麼(C)不可以
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