问题 选择题

关于简谐运动,下列说法正确的是(   )

A.简谐运动方程X=Asin(ωt+φ)中,A表示振幅,ω表示圆频率,φ表示相位

B.简谐运动中势能增加的过程是靠 * * 衡位置的过程

C.单摆简谐运动中,回复力是由合外力的切向分量提供的

D.半径很大的光滑圆弧面上有一小球,把它从最低点移开一小段距离后放手,小球将做简谐运动

答案

CD

简谐运动方程中,φ表示初相位,A错误;简谐运动中势能增加的过程是离开平衡位置的过程,B错误;根据简谐振动的特点可判断出CD正确。

阅读理解

The father’s role in the family is important. One researcher says babies who are cared for by their fathers have greater cognitive (认知的) development at one year of age than babies not cared for by their fathers. Another researcher reports that by spending time with their pre-school children, fathers can help to develop children’s language ability. Researchers also point out that for school-age children, fathers are one bridge with the outside world.

Fathers who value (重视) education have children who do better in school than those children whose fathers don’t value education. What’s more, fathers who spend quality time with their children may give their children happy memories which may last a lifetime.

While each father is a unique person who educates children in his own style, good fathers have something in common.

Good fathers attend their children’s school activities. They also involve the children in their lives and the adult world by taking them to see the workplace, or by taking them when the car needs to be repaired, etc.

Good fathers expect a great deal from their children, but also accept and support the unique individuals (个体) that their children are becoming.

Good fathers prefer explanations and reasoning to force.

Good fathers know their time with children is really an investment (投资) in them.

Being an involved father is good for children and good for fathers. Both children and fathers have the chance for growth and development. Today’s lifestyles are changing. More and more fathers are keeping a balance between their personal life, work, and family time.   

小题1:According to the passage, we can find that          .

A.fathers have an important influence on their children from babyhood through adulthood

B.fathers’ involvement (介入) is the most important in children’s development

C.all fathers have the same way of educating their children

D.fathers are more important than mothers in the family小题2:A unique person in the third paragraph means “a person who            ”.

A.has the same ideas as others

B.is the only one of his type

C.does everything without considering others’ ideas

D.tries to do everything well小题3:Which of the following statements is CORRECT according to the passage?   

A.Good fathers attend their children’s school activities but never take them to their workplace.

B.Good fathers expect a great deal from their children and force them to work hard.

C.Good fathers try to make it clear to their children that staying with their fathers is an investment.

D.Good fathers improve themselves when they spend time with their children.小题4:The passage is mainly about __________ .

A.how to be a qualified father

B.the growth and development of both fathers and children

C.the father’s role in the growth and development of children

D.the change of the father’s role in modern society

选择题