2012年3月14日,温家宝总理在回答记者提问时说:“没有政治体制改革的成功,文化大革.命这样的历史悲剧还有可能重新发生。”文革之所以是“历史悲剧”,是因为①民主法制遭受践踏 ②国民经济破坏严重③文化教育历经浩劫 ④外交事业停滞不前A.①②③④ B.①②③ C.③④ D.②④ The baby is just one day old and has not yet left
hospital. She is quiet but alert (警觉). Twenty
centimeters from her face researchers have placed a white card with two black
spots on it. She stares at it carefully. A researcher removes the card and
replaces it by another, this time with the spots differently spaced. As the
cards change from one to the other, her gaze(凝视)
starts to lose its focus - until a third, with three black spots, is presented.
Her gaze returns; she looks at it for twice as long as she did at the previous
card. Can she tell that the number two is different from three, just 24 hours
after coming into the world?
Or do newborns simply prefer more to fewer? The same
experiment, but with three spots shown before two, shows the same return of
interest when the number of spots changes. Perhaps it is just the newness? When
slightly older babies were shown cards with pictures of objects(a comb, a key,
an orange and so on), changing the number of objects had an effect separate
from changing the objects themselves. Could it be the pattern that two things
make, as opposed to three? No again. Babies paid more attention to squares
moving randomly on a screen when their number changed from two to three, or
three to two. The effect even crosses between senses. Babies who were
repeatedly shown two spots became more excited when they then heard three
drumbeats than when they heard just two; likewise(同样地) when the researchers started with drumbeats and
moved to spots.
1.The experiment described in Paragraph 1 is related
to the baby’s ______.
A.sense of
hearing.
B.sense of
sight.
C.sense of
touch.
D.sense of
smell.
2.Babies are sensitive to the change in ______.
A.the size of
cards.
B.the colour of
pictures.
C.the shape of
patterns.
D.the number of
objects.
3.Why did the researchers test the babies with
drumbeats?
A.To reduce the
difficulty of the experiment.
B.To see how
babies recognize sounds.
C.To carry
their experiment further.
D.To keep the
babies’ interest.
4.Where does this text probably come from?
A.Science
fiction.
B.Children’s literature.
C.An
advertisement.
D.A science
report.