问题 多选题

某物体沿竖直方向做直线运动,其v-t图象如图所示,规定向上为正方向,下列判断正确的是(  )

A.在0~1s内,物体平均速度为2 m/s

B.在ls~2s内,物体向上运动,且处于失重状态

C.在2s~3s内,物体的机械能守恒

D.在3s末,物体处于出发点上方

答案

A、在0~1s内,物体平均速度v=

0+v
2
=
4
2
=2m/s,故A正确;

B、在ls~2s内,位移一直增大,物体向上运动,但加速度方向向下,物体处于失重状态,故B正确;

C、在2s~3s内,物体的加速度为:a=

△v
△t
=
0-4
1
=-4m/s2,不是g,所以不只受重力,机械能不守恒,故C错误;

D、在3s末,图象与坐标轴围成的面积大于零,所以物体的位移为正,处于出发点上方,故D正确.

故选ABD

选择题
阅读理解

.

Warning: reading too much Cinderella to your daughter may damage her emotional health in later life. A paper to be developed at the international congress of cognitive psychotherapy in Gothenburg suggests a link between the attitudes of women abused by their parents and early exposure to the wrong sort of fairy tales. It says girls who identified with Cinderella, Rapunzel and Beauty in Beauty and the Beast were more likely to say in destructive relationships as adults.

The theory was developed by Susan Darker Smith, a psychotherapist at the University of Derby. She interviewed 67 female abuse survivors and found that 61 put up with serial abuse because they believed they could change their partners and with patience, composition and love. Hardly any of the women in a control group, who had not experienced abuse, thought they could change their partners in this way.

These women and men said they would leave a relationship rather than put up with abuse from a partner. Ms Darker Smith found the abused women were much more likely to identify with Cinderella and other submissive female characters in fairytales, who were later rescued by a stranger prince or hero.

Although most girls heard the stories, damage appeared to be done to those who adopted the submissive characters as role models. “They believe if their love is strong enough they can change their parents’ behaviors, she said.” Overexposure in children to stories that emphasize the transformational qualities of love may make women believe they can damage their partners.” For example, they might never have understood the obvious flaw(缺点) in the story of Rapunzel, who remained locked in a high tower until rescued by a knight on a white horse, who broke the door down. “The question,” said Ms Darker Smith, “is why she did not break the door down herself.”

59.The passage is especially intended for _________.

A.parents with young daughters

B.girls who like reading fairy stories

C.girls who think they can change their partners

D.parents with grown-up daughters

60.Cinderella, Rapunzel and Beauty in Beauty and the Beast are similar in that _________.

A.they all married some princes

B.they all changed their partners with love

C.they were all abused by their partners

D.they all put up with abuse

61.Which of the following statements is true of the women in a control group?

A.They don’t believe in fairy tales.

B.They don’t believe in the transformational qualities of love.

C.They have also experienced abuse.

D.They survived abuse.

62.What does the underlined word “submissive” in the 3rd paragraph probably mean?

A.kind-hearted      B.obedient       C.gentle                 D.easy-going