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(1)甲实验的目的是探究钢球动能的大小与 的关系;实验时,它是通过观察 ,从而判断钢球动能的大小。
(2)进行乙实验时,每一次都让同一小车从斜面上相同的高度由静止滑下,其目的是使小车在水平面运动的起始 相同;通过观察小车在粗糙程度不同的水平面上运动 来判断小车在不同的水平面受到 的大小.从而可以推理:如果运动的物体不受力,它将 。 查看习题详情和答案>>
完成句子,根据所给汉语提示,填写一个合适的单词或词组来完成该句。
His parents will ________ ________(动身)Changsha next Monday.
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根据表格所提供的信息选择最佳答案.
Here are four cards.Choose the answers after reading them.
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(1) ________ can draw us a lot of pictures.
[ ]
|
A .Li Hong |
B .Xie Zhongliang |
C .Zhao Bei |
(2) You could telephone, ________ for help if one of you is ill.
[ ]
|
A .Li Hong |
B .Xie Zhongliang |
C .Yang Liu |
(3) You could call ________ for help if you want to take your students to Jiaxing University for a science experiment.
[ ]
|
A .0573-2082937 |
B .0573-3642982 |
C .0573-5117578 |
(4) We could contact
(联系)________ by fax.[ ]
|
A .the artist |
B .the manager |
C .the driver |
(5) We use the numbers
“314500”if we want to ________ to Fangyuan Computer Center.[ ]
|
A .make a telephone call |
B .post a letter |
C .send an email |