A.Challenging mental work.
B.Unpleasant emotions.
C.Endless tasks.
D.Physical labor.
66.What's the author's attitude towards the scientists' ideas?
A.He agrees with them.
B.He doubts them.
C.He argues against them.
D.He hesitates to accept them.
67.We can infer from the passage that in order to stay energetic, sitting workers need to
________.
A.have some good food
B.enjoy their work
C.exercise regularly
D.discover fatigue toxins
2017·新课标全国卷Ⅰ] B
B
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?
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