This is for my mum.（就画线部分提问）_1_刷题宝

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This is for my mum.（就画线部分提问）____

上一题下一题 0.0难度选择题更新时间:2020-02-24 01:57:52

答案(点此获取答案解析）

Who is this for?

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下面图分别是从什么方向看到的？

同类题2

下列说法错误的是（　　）

同类题3

在探究光斑的形状与孔的大小关系时，小华在地面上铺一张白纸，将刻有边长为3cm等边三角形的纸板正对着太阳，保持纸板与地面距离为1m不变，用另一张卡片覆盖在三角形孔上，遮住孔的一部分，如图所示．让太阳光透过小孔，移动覆盖的卡片，改变通光孔的大小．刚开始时，白纸上光斑大小将 ____（“变大”、“不变”或“变小”），光斑亮度 ____（“增强”、“不变”或“减弱”）；当小孔足够小时，此时光斑形状是 ____形，继续移动覆盖的卡片，减小通光孔的大小，白纸上光斑大小将 ____（“变大”、“不变”或“变小”），光斑亮度 ____．（“增强”、“不变”或“减弱”）

同类题4

从对话后的选项中选出能填入空白处的最佳答案。其中有两项是多余的

A. You're welcome!

B. First, find out the reason why you didn't do well in the math exam.

C. You did them so well.

D. Is there anything wrong?

E. How are you feeling today?

F. But how can you help me with my math?

A: Hi，Lisa! You look upset. ____.

B: Yes. I did badly in the math exam. I'm afraid to tell my parents about it. I think they will be unhappy.

A: ____. Though your parents are strict with you, they also love you.

B: You are right. But what can I do?

A: ____. Then, work hard at your math. And I can help you with it.

B: It's really kind of you. ____.

A: You can come to my house after school every day.

B: Thank you so much!

A: ____.

同类题5

— When you to Beijing?

— Last month.

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