将四张花纹面相同的扑克牌的花纹面都朝上,两张一叠放成两堆不变.若每次可任选一堆的 发布时间:2017-05-01 03:30 │ 来源:www.tikuol.com 题型:填空题 问题: 将四张花纹面相同的扑克牌的花纹面都朝上,两张一叠放成两堆不变.若每次可任选一堆的最上面的一张翻看(看后不放回),并全部看完,则共有______种不同的翻牌方式.
题型:填空题 如图为A、B两物体沿直线运动的V-t图象,根据图象,以下分析正确的是:( )①A、B两物体都做匀加速直线运动②A物体的加速度大于B物体的加速度③2S末两物体相遇④若两物体从同一地点开始运动,则在0-2S内B物体在前,A物体在后,且两物体之间距离不断增大.A.只有①②④正确B.只有②③正确C.只有③④正确D.只有①②正确 查看答案
题型:填空题 根据对话内容,从下面的方框中选出可以填入空白处的最佳选项, 使对话完整, 并在答题卡上将该项涂黑。选项中有一项多余。Mum: David, what do your friends like to do? David: 小题1: I can take them to the park. Mum: 小题2:_____David: My friends enjoy watching football matches. 小题3:Mum: Thirdly, I can bring food for you. 小题4:David: After the match, I want to eat some cakes. After that, we can dance to pop music. 小题5: The sixth thing I want to do is to open my presents! A. What is the second thing you want to do? B. You can eat when you watch the match. C. They like to play football. D. When you play football, you can eat. E. We can watch a match. F. My friends and I enjoy dancing. 查看答案
题型:填空题 完成对话。A. It's history。B. Who is this boy? C. What's that in English? D. Where is he? E. Is he a student?A: Hello, Mona. __1__ B: It's a photo of my family.A: __2__ B: He is my cousm.A: __3__ B: He is in Shanghai with my uncle.A: __4__ B: Yes, he is.A: Do you know what his favorite subject is?B: Yes, __5__ 查看答案
题型:填空题 如下表除去杂质应选用的试剂或操作方法,正确的是( ) 序号物质杂质除杂质应选用的试剂或操作方法AKNO3溶液KOH加入FeCl3溶液,并过滤BFeCl3溶液FeCl2加入稍过量双氧水后放置CCOO2通过灼热的Cu网后收集气体DK2CO3固体NaHCO3置于坩埚中加热A.AB.BC.CD.D 查看答案