Do you believe that only boys do well in science？Does it seem to you that girls have better language skills than boys？In your opinion，are boys better at building things？If your answer to each of those questions is "Yes"，you are right．According to an article in Current Science．"There are exceptions（例外），but here are the facts．"

Usually，boys score higher on tests about math，while girls do better in tests about words，spelling and memory．But these differences may not always be true．In the future．a person's abilities may not be decided by sex．As one scientist says，"Nothing is impossible for a person to be or do．"

A recent study by Jerome Kagan，a scientist at Harward University is studying the watching ability of children 10 months old．Baby boys and baby girls are watching a "show" while seated on their mothers' laps．In ActⅠof the show，an orange﹣colored hall is lifted from a blue box and moved slowly．Then it is returned to the box．This is repeated six times．ActⅡis almost the same，except that the orange ball is smaller．

Baby boys do not seem to notice the difference in the size of the ball，but girls immediately become excited and begin to make noises that sound like language．

It's also known that baby girls usually talk at an earlier age than baby boys do．Scientists believe that the left side of the brain develops faster in girls than in boys．As a result，by the time they start to school，little girls have an advantage that boys don't have，but what have the boys been doing in the year before starting school？They have been developing something called aggression．An aggressive person feels strong and independent．He is often the first one to start a fight．It is said that aggression is caused by hormones（荷尔蒙）．Scientists believe that hormones are not the only cause．They say aggression in boys is also caused by mothers．

63．Where does this text possibly come from？ 　 　

A．	Reading for babies．
B．	A newspaper on science．
C．	A school notice．
D．	A travel guide．

64．According to the passage， 　 　．

A．	boys and girls have completely different skills
B．	it is impossible for girls to become a scientist in the future
C．	girls always get higher scores than boys in math
D．	boys may usually do better in building things than girls

65．The writer uses the example of the orange ball to show that 　 　

A．	baby boys are cleverer than baby girls
B．	baby boys are not interested in shows
C．	baby girls are better at watching different things
D．	baby girls talk at an earlier age than baby boys do

66．The underlined word aggression in paragraph 3 means 　 　．

A．	an angry feeling
B．	a nice feeling
C．	a happy feeling
D．	a sad feeling．