三角形第一边的长为m+n，第二，三边的长分别比第一边的长大m﹣3

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问题选择题

三角形第一边的长为m+n，第二，三边的长分别比第一边的长大m﹣3和2n，那么这个三角形的周长为[ ]

A．2m+3n﹣3

B．2m+3n+3

C．3m+4n﹣3

D．4m+5n﹣3

答案

答案：D

选择题

选择翻译正确的句子。

1. 我可以去北京旅行吗？ [ ]

A. May I go on a trip to Beijing?

B. May I go to Beijing?

2. 我乘坐飞机去加拿大。[ ]

A. I go to China by plane.

B. I go to Canada by plane.

3. 我早上六点钟离开北京。 [ ]

A. I leave in Beijing at 6: 00 in the evening.

B. I leave Beijing at 6: 00 in the morning.

4. 火车比公共汽车快，比飞机慢。 [ ]

A. A train is faster than a bus, but slower than an airplane.

B. A train is slower than a bus, but faster than an airplane.

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