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问题 实验题

某实验小组在利用单摆测定当地重力加速度的实验中：

（1）用游标卡尺测定摆球的直径，测量结果如图所示，则该摆球的直径为____cm。

（2）小组成员在实验过程中有如下说法，其中正确的是____。（填选项前的字母）

A．把单摆从平衡位置拉开30°的摆角，并在释放摆球的同时开始计时

B．测量摆球通过最低点100次的时间t，则单摆周期为

C．用悬线的长度加摆球的直径作为摆长，代入单摆周期公式计算得到的重力加速度值偏大

D．选择密度较小的摆球，测得的重力加速度值误差较小

答案

（1）0.97(0.96、0.98均可)

（2）C

选择题

   —What has Tom been doing recently?

—I don’t know, ________ care.

A．nor do I

B．nor I do

C．neither am I

D．neither I am
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Being a winner

小题1:          Everyone wants to succeed in their career or life. Sometimes it is easy to get carried away with the eagerness to win and forget about the things in everyday life which are important.小题2:          Education is the tool to succeeding in life and a person’s greatest accomplishments(成就) start with good education. School will prepare you for your toughest challenges and learning as much as you can will only make those challenges easier to face.

小题3:       Families are quite often a person’s biggest asset(财产) when facing a difficult obstacle(障碍). Support from a person’s family can help him or her accomplish anything. It is equally important for you to give your parents and family support when they face their challenges. You can learn from the challenges and accomplishments of others and at the same time know that your support made a difference in the outcome of a difficult obstacle. 

小题4:       But always remember that being a winner is more than coming in first place in a tournament(锦标赛). The most important accomplishments are those that occur in everyday life. 小题5:       

A．Being a winner is important to all of us.

B．Your efforts will pay off sooner or later.

C．Children need to work hard to be a winner in school.

D．Being a winner is something that we all work hard for in life. E. It is also important to be a winner to your parents and family.

F. It is important to know how to win support from your family or friends

G. Being a good person and treating others with respect make you a true winner.
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