Did you ever have someone’s name on the tip of your tongue and yet you were unable to recall it (1) this happens again, do no (2) to recall it. Do something (3) for a couple of minutes, (4) the name may come into your head. The name is there since you have met (5) person and his name. It (6) has to be dug out. The initial effort to recall (7) the mind for operation, but it is the subconscious (8) that go to work to dig up a (9) memory. Forcing yourself to recall (10) never helps because it doesn’t (11) your memory；it only tightens it. Students find the preparatory method help (12) examinations. They read over the questions (13) trying to answer any of them. (14) they answer first the ones (15) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (16) ; work is being done on the (17) difficult questions. By the time the easier questions are answered, answers (18) the more difficult ones will usually begin to (19) into consciousness. It is often (20) a question of waiting for recall to come to the memory.
Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1.11（）
A:loosen B:weaken C:decrease D:reduce
A:loosen B:weaken C:decrease D:reduce
The substance can be added to gasoline to accelerate the speed of automobiles.（ ）
A:quicken B:shorten C:loosen D:enlarge
There are two great mysteries about the beach. One is why human beings flock there by thousands, only to prostrate(俯卧) themselves in dense packs of glistening flesh. The other is why the sand goes there. Strange as it seems, oceanographers have never really understood why sand piles up on the shore. Now Douglas Inman and Daniel Conley think they have solved the puzzle.
The puzzle had to do with waves. Though it might seem intuitive that waves carry water to shore, and sand along with it, it’s not that simple. The crest(浪尖)of a passing wave lifts a given hit of water upward and landward, but the ensuing trough(波谷) pushes the water back down and Out to sea. Near the bottom, there the sand is, the water was always assumed to just slide back and forth—and the sand with it. "If you take a very aloof look at a beach," says Inman, "you’ll realize that if the two motions move sand back and forth the same amount, then all the sand should end up in deep water.’
So for beaches to exist, the crest’s onshore flow must somehow move enough sand up the beach to counter the seaward tug of both the trough and gravity . The pressure changes in the sand bed, Inman and Conley think, are the key to beach creation. They found that sand doesn’t just slide back and forth with each passing wave. Under a trough, it does slide seaward, in a thin layer just above the bottom. But under a crest its movement is often more elaborate. The higher pressure under a crest—higher because the water is piled higher—forces water into the porous(多孔的) sand. This creates strong whirlpools just above the sand, which help loosen it. As the crest passes overhead, the sand first rushes across the bottom; then it abruptly turns violent lifting off the bottom in large, boiling bunches. Finally, just after the crest passes, the sand explodes up into the great water column. The boiling and rushing move more sand than the backsliding under a trough, so there’s a net movement of sand toward the shore.
Which of the following is not a step of beach creation（ ）
A:Water is forced into sand by the high pressure under a crest. B:Strong whirlpools loosen the sand. C:The sand is first at the bottom when a crest passes. D:More sand is pushed back to the sea.
{{B}}第三篇{{/B}}
? ?There are two great mysteries about the
beach. One is why human beings flock there by thousands, only to prostrate(俯卧)
themselves in dense packs of glistening flesh. The other is why the sand goes
there. Strange as it seems, oceanographers have never really understood why sand
piles up on the shore. Now Douglas Inman and Daniel Conley think they have
solved the puzzle.
? ?The puzzle had to do with waves. Though it
might seem intuitive that waves carry water to shore, and sand along with it,
it’s not that simple. The crest(浪尖)of a passing wave lifts a given hit of water
upward and landward, but the ensuing trough(波谷) pushes the water back down and
Out to sea. Near the bottom, there the sand is, the water was always assumed to
just slide back and forth—and the sand with it. "If you take a very aloof look
at a beach," says Inman, "you’ll realize that if the two motions move sand back
and forth the same amount, then all the sand should end up in deep
water.’
? ?So for beaches to exist, the crest’s onshore flow must
somehow move enough sand up the beach to counter the seaward tug of both the
trough and gravity . The pressure changes in the sand bed, Inman and Conley
think, are the key to beach creation. They found that sand doesn’t just slide
back and forth with each passing wave. Under a trough, it does slide seaward,
?in a thin layer just above the bottom. But under a crest its movement is
often more elaborate. ?The higher pressure under a crest—higher because the
water is piled higher—forces water ?into the porous(多孔的) sand. This creates
strong whirlpools just above the sand, which help loosen it. As the crest passes
overhead, the sand first rushes across the bottom; then it abruptly turns
violent lifting off the bottom in large, boiling bunches. Finally, just after
the crest passes, the sand explodes up into the great water column. The boiling
and rushing move more sand than the backsliding under a trough, so there’s a net
movement of sand toward the shore. |
Which of the following is not a step of beach creation?
A:Water is forced into sand by the high pressure under a crest. B:Strong whirlpools loosen the sand. C:The sand is first at the bottom when a crest passes. D:More sand is pushed back to the sea.
The substance can be added to gasoline to {{U}}accelerate{{/U}} the speed of automobiles.
A:quicken B:shorten C:loosen D:enlarge
The substance can be added to gasoline to accelerate the speed of automobiles.
A:quicken B:shorten C:loosen D:enlarge
The substance can be added to gasoline to {{U}}accelerate{{/U}} the speed of automobiles.
A:quicken B:shorten C:loosen D:enlarge
单选题
