问题 填空题

用一个平面去截长方体,三棱柱,圆柱,和圆锥,其中不能截出三角形的几何体是______.

答案

长方体沿体面对角线截几何体可以截出三角形,三棱柱沿顶点截几何体可以截得三角形,圆柱不能截出三角形,圆锥沿顶点可以截出三角形,故不能截出三角形的几何体是圆柱.

完形填空
配对阅读。左栏是对5个学生做演讲时存在问题的描述,请在右栏为每个学生选择一个合适的建议,并将答题卡上对应题目所选的选项涂黑。
小题1:Paul: I don’t think I can talk fluently(流利) because it’s difficult for me to remember all the words.
小题2:Billy: When I come face to face with the audience, where should my eyes fall upon? Do I have to look front, or look around from time to time?
小题3:Amy: When I am talking, I can’t help waving my hands, for I think it can help me express what I want to say better. But my classmates say I look funny and foolish by doing this.
小题4:Betty: I know that it’s not right to speak fast. But I am afraid that I can’t finish my talk in the given time if I speak slowly.
小题5:Tony: Should I talk in American English or British English?
A.Looking at and talking to one person in the audience helps keep you natural, but it feels foolish talking to only one person. Speak to that person as long as 15 seconds and then change another one.
B.The audience have a hard time understanding what they hear. They need your help. Slow down, pause(停顿) and guide the audience through your talk. Remember that you should help the audience understand what you are saying.
C.Make your voice a little lower than normal. Listeners like to listen to a relatively(相对) deep voice.
D.When you talk, try to be as natural as possible. Don’t try to memorize your words and read or recite them to your audience. You can use short notes to help you remember the important points.
E. You should know you and most of the people you talk to are different in many ways. Some of them may not know what you are talking about. Then speak to them on their terms and in their languages.
F. Concentrate on what you want to say. If you are always paying attention to gestures(手势),you will feel uncomfortable.
G. It’s true that there are some differences between American English and British English, but they’ll not cause much difficulty for listeners, so just speak the way you’re used to.
单项选择题 B型题