题目内容
（请给出正确答案）
A.print（a.count（））
B.print（ a.remove（'one'） ）
C.print（a.count（'one'））
答案
C、print（a.count（'one'））
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更多“a=【'one','two',3,'four','six',…”相关的问题
A.Trojan horse
B.Phreaking
C.Spoofing
D.SYN flood
3 Communication in both project and non-project-driven organizations should occur in directions.
A. one
B. two
C. three
D. four
E. five
157 Fast tracking means to:
A. Speed up a project through parallel tasks.
B. Swap one task for another.
C. Reduce the number of tasks if possible.
D. B and C.
E. None of the above
A.our,none
B.our,five,none
C.ive
D.ive,none
Take a second long piece of paper. Twist the paper once and glue the ends together. Now you have made a Mobius band(带子). For people studying maths, this band is uncommon.
This strange band was first made in the 1800s by a German man namedAugust. Mobius. Mr. Mobius studied maths. He wanted to find a way to show how this band works with maths. Understand it or not, this band has only one surface. You can find this out for yourself.
If you draw a line on the surface of the paper before you twist and glue it, the line is only on one side of the paper. The paper has two surfaces. However, if you draw a line after you make the Mobius band, you can follow the line around all sides of the paper. In other words, the Mobius band must have only one surface.
It is also very interesting to see what happens when you cut the band. If you cut the Mobius band in half once down the line you drew, you do not get two Mobius bands. Instead, after you cut the band, it turns into one large twisted ring. Then, if you cut this ring in half along the middle of the band again, you get two connected(相连的)Mobius bands.
1、What is a Mobius band？()
A、A long piece of paper
B、A paper ring for people to wear
C、A metal ring for music
D、An interesting twisted ring
2、Why didAugust Mobius make this ring？()
A、To help study a maths problem
B、To show it's the same as others
C、To show the only surface of any band
D、To find out how many sides it has
3、How can you change the two surfaces of a long piece of paper into one surface？()
A、Glue the ends of the long piece of paper
B、Cut the two surfaces of the paper into one
C、Draw a line in the middle of the paper
D、Twist the paper once and glue the two ends
4、What do you get if you cut the Mobius band along the middle？()
A、A long piece of paper
B、Two long pieces of paper
C、Two Mobius bands
D、One large twisted ring
5、Which of the following is NOT true？()
A、You can use any long piece of paper to make a Mobius band
B、Any long piece of paper has two surfaces
C、The Mobius band was first made about two hundred years ago
D、You have to draw a line in the middle of the long piece of paper before making a Mobius band
A.to kill two birds with one bow
B.to kill two birds with one stone
C.to kill two birds with one gun
D.to kill two birds with one arrow
A.Two hundreds and eight hundreds is one thousands
B.Two hundreds and eight hundreds is one thousand
C.Two hundred and eight hundred is one thousand
